#577DA7
Closest named color: Stormy Blue (#507B9C). oklch(57.9% 0.078 251.7), rgb(87, 125, 167).
Aa
Black text reads best on this color (4.89:1).
About this color
#577DA7 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 58%, its chroma 0.078 and its hue 252°. Its hue sits on the cool side of the wheel. The nearest named color is Stormy Blue (#507B9C), ΔE 0.020 away. Black text reads best on it, at 4.89:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | moderately saturated (0.078) |
| Temperature | cool |
| Nearest name | Stormy Blue (#507B9C) |
| Black text | 4.89:1 |
| White text | 4.28:1 |
Values
| HEX | #577DA7 |
| RGB | rgb(87, 125, 167) |
| HSL | hsl(212, 31%, 50%) |
| OKLCH | oklch(57.9% 0.078 251.7) |
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 #577DA7 | 4.28:1 | AA large text | Lc -75.1 | Fine for body text |
| Black text on #577DA7 | 4.89:1 | AA | Lc 34.5 | Non-text elements, placeholder text |
| #577DA7 text on white | 4.28:1 | AA large text | Lc 69.6 | Content text, not long reading |
| #577DA7 text on black | 4.89:1 | AA | Lc -32.1 | 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
#F3F6F9
oklch(97.2% 0.005 247.9)
-
Step 100
100
#E5EAF1
oklch(93.5% 0.011 256.7)
-
Step 200
200
#D0DAE6
oklch(88.4% 0.02 252.9)
-
Step 300
300
#B1C3D7
oklch(81% 0.035 251)
-
Step 400
400
#87A3C3
oklch(70.6% 0.057 252)
-
Step 500
500
#698DB4
oklch(63.2% 0.072 251)
-
Step 600
600 (this color)
#577DA7
oklch(57.9% 0.078 251.7)
-
Step 700
700
#416389
oklch(49.1% 0.073 252.1)
-
Step 800
800
#36516F
oklch(42.7% 0.06 251.8)
-
Step 900
900
#2F435A
oklch(37.6% 0.047 252.5)
-
Step 950
950
#1C2735
oklch(26.9% 0.03 254.7)
#577DA7 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) | #6C7FA9 | 0.028 |
| Deuteranopia (no green cones) | #6277A6 | 0.020 |
| Tritanopia (no blue cones) | #34878B | 0.069 |
| Achromatopsia (no color) | #7A7A7A | 0.078 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #577DA7
#577DA7
oklch(57.9% 0.078 251.7)
- #977244
#977244
oklch(57.9% 0.078 71.3)
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 #577DA7, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Stormy Blue #507B9C ΔE 0.020
- Off Blue #5684AE ΔE 0.020
- Steel Blue #4682B4 ΔE 0.025
- Dusty Blue #5A86AD ΔE 0.026
- Cerulean #457B9D ΔE 0.027
- Cool Blue #4984B8 ΔE 0.030
- Dull Blue #49759C ΔE 0.032
- Grey Blue #647D8E ΔE 0.041
Use #577DA7 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.