#577DA0
Closest named color: Stormy Blue (#507B9C). oklch(57.5% 0.069 247.1), rgb(87, 125, 160).
Aa
Black text reads best on this color (4.84:1).
About this color
#577DA0 is a medium-dark, muted blue. In OKLCH its lightness is 58%, its chroma 0.069 and its hue 247°. Its hue sits on the cool side of the wheel. The nearest named color is Stormy Blue (#507B9C), ΔE 0.012 away. Black text reads best on it, at 4.84:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | muted (0.069) |
| Temperature | cool |
| Nearest name | Stormy Blue (#507B9C) |
| Black text | 4.84:1 |
| White text | 4.33:1 |
Values
| HEX | #577DA0 |
| RGB | rgb(87, 125, 160) |
| HSL | hsl(209, 30%, 48%) |
| OKLCH | oklch(57.5% 0.069 247.1) |
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 #577DA0 | 4.33:1 | AA large text | Lc -75.4 | Fine for body text |
| Black text on #577DA0 | 4.84:1 | AA | Lc 34.1 | Non-text elements, placeholder text |
| #577DA0 text on white | 4.33:1 | AA large text | Lc 69.9 | Content text, not long reading |
| #577DA0 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
#E5EAF0
oklch(93.5% 0.01 252.8)
-
Step 200
200
#D0DAE4
oklch(88.4% 0.018 248)
-
Step 300
300
#B1C3D4
oklch(80.9% 0.031 246.7)
-
Step 400
400
#88A4BF
oklch(70.7% 0.05 247.6)
-
Step 500
500
#6A8DAE
oklch(63% 0.064 247.4)
-
Step 600
600 (this color)
#577DA0
oklch(57.5% 0.069 247.1)
-
Step 700
700
#426483
oklch(49% 0.064 247)
-
Step 800
800
#37526B
oklch(42.8% 0.053 247.3)
-
Step 900
900
#2F4457
oklch(37.7% 0.042 246.5)
-
Step 950
950
#1C2833
oklch(27.1% 0.026 246.6)
#577DA0 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) | #6F7EA2 | 0.031 |
| Deuteranopia (no green cones) | #65769F | 0.025 |
| Tritanopia (no blue cones) | #398589 | 0.058 |
| Achromatopsia (no color) | #797979 | 0.069 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #577DA0
#577DA0
oklch(57.5% 0.069 247.1)
- #95714C
#95714C
oklch(57.6% 0.069 66.5)
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 #577DA0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Stormy Blue #507B9C ΔE 0.012
- Cerulean #457B9D ΔE 0.022
- Off Blue #5684AE ΔE 0.025
- Dusty Blue #5A86AD ΔE 0.029
- Dull Blue #49759C ΔE 0.030
- Grey Blue #647D8E ΔE 0.031
- Steel Blue #4682B4 ΔE 0.033
- Cool Blue #4984B8 ΔE 0.038
Use #577DA0 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.