#57657B
Closest named color: Slate (#516572). oklch(50.3% 0.039 259.4), rgb(87, 101, 123).
Aa
White text reads best on this color (5.91:1).
About this color
#57657B is a medium-dark, muted blue. In OKLCH its lightness is 50%, its chroma 0.039 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Slate (#516572), ΔE 0.018 away. White text reads best on it, at 5.91:1.
| Hue family | Blues |
| Lightness | medium-dark (50%) |
| Chroma | muted (0.039) |
| Temperature | cool |
| Nearest name | Slate (#516572) |
| Black text | 3.55:1 |
| White text | 5.91:1 |
Values
| HEX | #57657B |
| RGB | rgb(87, 101, 123) |
| HSL | hsl(217, 17%, 41%) |
| OKLCH | oklch(50.3% 0.039 259.4) |
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 #57657B | 5.91:1 | AA | Lc -84.8 | Fine for body text |
| Black text on #57657B | 3.55:1 | AA large text | Lc 24.5 | Dividers and decoration only |
| #57657B text on white | 5.91:1 | AA | Lc 79.6 | Fine for body text |
| #57657B text on black | 3.55:1 | AA large text | Lc -22.3 | Dividers and decoration only |
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 700.
-
Step 50
50
#F4F5F7
oklch(97% 0.003 264.5)
-
Step 100
100
#E8EAEE
oklch(93.7% 0.006 264.5)
-
Step 200
200
#D5D9E0
oklch(88.4% 0.011 261.8)
-
Step 300
300
#B9C1CD
oklch(80.8% 0.019 258.4)
-
Step 400
400
#96A1B4
oklch(70.6% 0.03 261.4)
-
Step 500
500
#7C8AA1
oklch(63% 0.038 260.3)
-
Step 600
600
#65748C
oklch(55.6% 0.042 259.8)
-
Step 700
700 (this color)
#57657B
oklch(50.3% 0.039 259.4)
-
Step 800
800
#445061
oklch(42.8% 0.032 257.1)
-
Step 900
900
#3A424F
oklch(37.7% 0.025 260.1)
-
Step 950
950
#22272E
oklch(27.1% 0.015 256.8)
#57657B 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) | #5E667C | 0.011 |
| Deuteranopia (no green cones) | #5A637B | 0.007 |
| Tritanopia (no blue cones) | #4D6A6C | 0.036 |
| Achromatopsia (no color) | #646464 | 0.039 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #57657B
#57657B
oklch(50.3% 0.039 259.4)
- #70624B
#70624B
oklch(50.3% 0.039 80)
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 #57657B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate #516572 ΔE 0.018
- Dusty Grape #545775 ΔE 0.041
- Dim Gray #696969 ΔE 0.043
- Metallic Blue #4F738E ΔE 0.044
- Denim #3B638C ΔE 0.045
- YInMn Blue #415A77 ΔE 0.047
- Dusky Blue #475F94 ΔE 0.053
- Dusk #4E5481 ΔE 0.057
Use #57657B 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.