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Confident Isis Ultramarine

#587de0
Notes

Confident Isis Ultramarine (#587DE0) is a true azure with a vibrant character. It holds its own as a focal accent, carrying visual weight without tipping into neon territory. Its HSL profile (224°, 69%, 61%) places it in the balanced band at a mid lightness. It works across type, buttons, and borders, saturated enough to feel deliberate but balanced enough to not fight the rest of the palette. For a confident two-color system, pair it with its complementary amber. For something softer, pull in its analogous neighbors on either side of the wheel.

HEX
#587de0
RGB
rgb(88, 125, 224)
HSL
hsl(224, 69%, 61%)
HWB
hwb(224 35% 12%)
OKLCH
oklch(61.1% 0.156 266.4)
P3
color(display-p3 0.3760 0.4862 0.8517)
HSV
hsv(224, 61%, 88%)
LAB
lab(54.16% 17.14 -54.46)
LCH
lch(54.16% 57.10 287.47)
CMYK
cmyk(61%, 44%, 0%, 12%)

Etymology

Confident
adjective

A late-Latin participle, confidens, trusting — borrowed into English in the sixteenth century. As a color modifier, confident implies saturation combined with poise: a confident red doesn't try too hard, just sits at the level of its hue without overreaching. Sits in the bold-bucket center near bold and resolute.

Isis
modifier

Egyptian Aset, throne-and-mother-goddess. As a color modifier, isis implies a winged-and-throne-and-mother-goddess quality, the visual register of Egyptian-Isis-and-Philae-temple hand-winged-and-throne-and-mother-goddess Egyptian-Isis-and-Philae-temple-and-Osirian-myth isis-and-winged-and-throne-and-mother-goddess surfaces under Egyptian-Isis-and-Philae-temple-and-Osirian-myth Nile-and-Philae-Aswan-temple winged-throne-light. Sits at the modifier-and-myth end of the grid, parallel to horus and thoth in usage.

Ultramarine
noun

The pigment ground from lapis lazuli — the Afghan mineral imported through Venice in the late Middle Ages, more expensive by weight than gold during the Renaissance. The color refers to a freshly mixed ultramarine pigment in linseed oil: a saturated, slightly violet-shifted deep blue with the matte finish of micron-ground rock. Deeper than cobalt, cooler than royal, with the art-historical weight of the blue Vermeer reserved for Mary's robe.

Closest matches

The nearest named color in three reference sources, ranked by perceptual distance (ΔE76 in CIELAB). ΔE < 1 is imperceptible to most viewers; ΔE > 10 is clearly different. When two sources point to the same hex they’re merged into one tile; click any to open that color’s page.

Variations

Click any swatch to explore

Harmonies

Accessibility

Color-vision simulation

How this color appears to viewers with the four major color-vision-deficiency types. Computed via the Machado (2009) physiologically-based model. If a tile matches the original, the color reads the same to that viewer.

#587de0
Original
#4f88e4
Protanopia
#3a7cde
Deuteranopia
#0093a4
Tritanopia
#7c7c7c
Achromatopsia
WCAG contrast

The color used as foreground text against pure white and pure black, with the contrast ratio and WCAG 2.1 grade. Aim for AA (4.5:1) for body text and AA Large (3:1) for 18 pt+ headlines; AAA (7:1) is the gold standard for long-form reading surfaces.

The quick brown foxSample body text at normal size. The wcag minimum for body contrast is 4.5:1 (AA) or 7:1 (AAA).
AA Largeon White
3.87:1
The quick brown foxSample body text at normal size. The wcag minimum for body contrast is 4.5:1 (AA) or 7:1 (AAA).
AAon Black
5.42:1

Wide gamut

Display P3 representation

The CSS Color 4 wide-gamut form of this color. Both swatches render the same color on every display — the P3 form only diverges from sRGB when a designer pushes channels outside sRGB's reach.

sRGB hex
sRGB hex
##587DE0
Display P3
Display P3
color(display-p3 0.3760 0.4862 0.8517)
P3 has subtle headroomOKLCH chroma 0.156

Moderately saturated colors gain a small bump in P3 — the difference is usually visible side-by-side on wide-gamut hardware but won't change the character of the color.

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