#577E98
Closest named color: Stormy Blue (#507B9C). oklch(57.4% 0.059 238.3), rgb(87, 126, 152).
Aa
Black text reads best on this color (4.84:1).
About this color
#577E98 is a medium-dark, muted blue. In OKLCH its lightness is 57%, its chroma 0.059 and its hue 238°. Its hue sits on the cool side of the wheel. The nearest named color is Stormy Blue (#507B9C), ΔE 0.015 away. Black text reads best on it, at 4.84:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | muted (0.059) |
| Temperature | cool |
| Nearest name | Stormy Blue (#507B9C) |
| Black text | 4.84:1 |
| White text | 4.33:1 |
Values
| HEX | #577E98 |
| RGB | rgb(87, 126, 152) |
| HSL | hsl(204, 27%, 47%) |
| OKLCH | oklch(57.4% 0.059 238.3) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #577E98 | 4.33:1 | AA large text | Lc -75.5 | Fine for body text |
| Black text on #577E98 | 4.84:1 | AA | Lc 34.1 | Non-text elements, placeholder text |
| #577E98 text on white | 4.33:1 | AA large text | Lc 70.0 | Content text, not long reading |
| #577E98 text on black | 4.84:1 | AA | Lc -31.7 | Non-text elements, placeholder text |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 600.
-
Step 50
50
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E5EBEE
oklch(93.6% 0.008 228.9)
-
Step 200
200
#D1DBE2
oklch(88.6% 0.015 238)
-
Step 300
300
#B1C4D0
oklch(81% 0.027 235.4)
-
Step 400
400
#89A5B9
oklch(70.8% 0.043 239.3)
-
Step 500
500
#6B8FA7
oklch(63.2% 0.054 237.9)
-
Step 600
600 (this color)
#577E98
oklch(57.4% 0.059 238.3)
-
Step 700
700
#42657D
oklch(49% 0.056 239.4)
-
Step 800
800
#375365
oklch(42.8% 0.045 237.4)
-
Step 900
900
#304453
oklch(37.6% 0.036 241.3)
-
Step 950
950
#1C2830
oklch(26.9% 0.022 237.9)
#577E98 with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #727D99 | 0.034 |
| Deuteranopia (no green cones) | #6A7698 | 0.031 |
| Tritanopia (no blue cones) | #3E8586 | 0.048 |
| Achromatopsia (no color) | #797979 | 0.059 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #577E98
#577E98
oklch(57.4% 0.059 238.3)
- #947056
#947056
oklch(57.4% 0.059 57.1)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #577E98, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Stormy Blue #507B9C ΔE 0.015
- Grey Blue #647D8E ΔE 0.020
- Cerulean #457B9D ΔE 0.024
- Off Blue #5684AE ΔE 0.034
- Slate Gray #708090 ΔE 0.035
- Dull Blue #49759C ΔE 0.035
- Metallic Blue #4F738E ΔE 0.035
- Battleship Grey #6B7C85 ΔE 0.035
Use #577E98 in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.