#57737F
Closest named color: Metallic Blue (#4F738E). oklch(53.8% 0.038 226.1), rgb(87, 115, 127).
Aa
White text reads best on this color (5.04:1).
About this color
#57737F is a medium-dark, muted teal or cyan. In OKLCH its lightness is 54%, its chroma 0.038 and its hue 226°. Its hue sits on the cool side of the wheel. The nearest named color is Metallic Blue (#4F738E), ΔE 0.025 away. White text reads best on it, at 5.04:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (54%) |
| Chroma | muted (0.038) |
| Temperature | cool |
| Nearest name | Metallic Blue (#4F738E) |
| Black text | 4.16:1 |
| White text | 5.04:1 |
Values
| HEX | #57737F |
| RGB | rgb(87, 115, 127) |
| HSL | hsl(198, 19%, 42%) |
| OKLCH | oklch(53.8% 0.038 226.1) |
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 #57737F | 5.04:1 | AA | Lc -80.2 | Fine for body text |
| Black text on #57737F | 4.16:1 | AA large text | Lc 29.2 | Dividers and decoration only |
| #57737F text on white | 5.04:1 | AA | Lc 74.8 | Content text, not long reading |
| #57737F text on black | 4.16:1 | AA large text | Lc -26.9 | 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 600.
-
Step 50
50
#F4F6F6
oklch(97.2% 0.002 197.1)
-
Step 100
100
#E7EAEC
oklch(93.5% 0.004 236.5)
-
Step 200
200
#D3DADE
oklch(88.4% 0.009 232.4)
-
Step 300
300
#B6C3C9
oklch(80.9% 0.017 227)
-
Step 400
400
#90A4AE
oklch(70.6% 0.027 229.3)
-
Step 500
500
#748E9A
oklch(63.1% 0.035 227.6)
-
Step 600
600 (this color)
#57737F
oklch(53.8% 0.038 226.1)
-
Step 700
700
#4C6570
oklch(49.1% 0.035 226.7)
-
Step 800
800
#3E535B
oklch(42.8% 0.029 223.3)
-
Step 900
900
#35444B
oklch(37.6% 0.023 228)
-
Step 950
950
#1F282C
oklch(27% 0.015 226.6)
#57737F 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) | #6D7280 | 0.030 |
| Deuteranopia (no green cones) | #666D7F | 0.026 |
| Tritanopia (no blue cones) | #4A7777 | 0.026 |
| Achromatopsia (no color) | #6F6F6F | 0.038 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #57737F
#57737F
oklch(53.8% 0.038 226.1)
- #81685C
#81685C
oklch(53.8% 0.037 47)
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 #57737F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Metallic Blue #4F738E ΔE 0.025
- Battleship Gray #6C757D ΔE 0.030
- Grey Blue #647D8E ΔE 0.039
- Battleship Grey #6B7C85 ΔE 0.040
- Dim Gray #696969 ΔE 0.041
- Slate #516572 ΔE 0.044
- Stormy Blue #507B9C ΔE 0.045
- Dull Blue #49759C ΔE 0.046
Use #57737F 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.