#577AA7
Closest named color: Stormy Blue (#507B9C). oklch(57.2% 0.081 255.1), rgb(87, 122, 167).
Aa
Black text reads best on this color (4.74:1).
About this color
#577AA7 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 57%, its chroma 0.081 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is Stormy Blue (#507B9C), ΔE 0.021 away. Black text reads best on it, at 4.74:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | moderately saturated (0.081) |
| Temperature | cool |
| Nearest name | Stormy Blue (#507B9C) |
| Black text | 4.74:1 |
| White text | 4.42:1 |
Values
| HEX | #577AA7 |
| RGB | rgb(87, 122, 167) |
| HSL | hsl(214, 31%, 50%) |
| OKLCH | oklch(57.2% 0.081 255.1) |
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 #577AA7 | 4.42:1 | AA large text | Lc -76.1 | Fine for body text |
| Black text on #577AA7 | 4.74:1 | AA | Lc 33.5 | Non-text elements, placeholder text |
| #577AA7 text on white | 4.42:1 | AA large text | Lc 70.6 | Content text, not long reading |
| #577AA7 text on black | 4.74:1 | AA | Lc -31.1 | 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
#D0DAE7
oklch(88.5% 0.021 254.9)
-
Step 300
300
#B1C2D8
oklch(80.8% 0.036 254.9)
-
Step 400
400
#89A3C5
oklch(70.8% 0.058 255.3)
-
Step 500
500
#6B8CB6
oklch(63.2% 0.074 254.8)
-
Step 600
600 (this color)
#577AA7
oklch(57.2% 0.081 255.1)
-
Step 700
700
#43628B
oklch(49% 0.076 255.7)
-
Step 800
800
#375071
oklch(42.6% 0.063 255.7)
-
Step 900
900
#30435B
oklch(37.8% 0.048 254.6)
-
Step 950
950
#1C2735
oklch(26.9% 0.03 254.7)
#577AA7 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) | #697CA9 | 0.024 |
| Deuteranopia (no green cones) | #5F74A6 | 0.018 |
| Tritanopia (no blue cones) | #35848A | 0.070 |
| Achromatopsia (no color) | #787878 | 0.081 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #577AA7
#577AA7
oklch(57.2% 0.081 255.1)
- #94713F
#94713F
oklch(57.2% 0.08 74.8)
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 #577AA7, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Stormy Blue #507B9C ΔE 0.021
- Cerulean #457B9D ΔE 0.027
- Dull Blue #49759C ΔE 0.028
- Off Blue #5684AE ΔE 0.028
- Steel Blue #4682B4 ΔE 0.029
- Cool Blue #4984B8 ΔE 0.034
- Dusty Blue #5A86AD ΔE 0.034
- Flat Blue #3C73A8 ΔE 0.038
Use #577AA7 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.