#57738F
Closest named color: Metallic Blue (#4F738E). oklch(54.5% 0.055 248.9), rgb(87, 115, 143).
Aa
White text reads best on this color (4.93:1).
About this color
#57738F is a medium-dark, muted blue. In OKLCH its lightness is 54%, its chroma 0.055 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Metallic Blue (#4F738E), ΔE 0.010 away. White text reads best on it, at 4.93:1.
| Hue family | Blues |
| Lightness | medium-dark (54%) |
| Chroma | muted (0.055) |
| Temperature | cool |
| Nearest name | Metallic Blue (#4F738E) |
| Black text | 4.25:1 |
| White text | 4.93:1 |
Values
| HEX | #57738F |
| RGB | rgb(87, 115, 143) |
| HSL | hsl(210, 24%, 45%) |
| OKLCH | oklch(54.5% 0.055 248.9) |
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 #57738F | 4.93:1 | AA | Lc -79.6 | Fine for body text |
| Black text on #57738F | 4.25:1 | AA large text | Lc 29.9 | Dividers and decoration only |
| #57738F text on white | 4.93:1 | AA | Lc 74.1 | Content text, not long reading |
| #57738F text on black | 4.25:1 | AA large text | Lc -27.6 | 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
#F4F6F8
oklch(97.2% 0.003 247.9)
-
Step 100
100
#E6EAEE
oklch(93.5% 0.007 247.9)
-
Step 200
200
#D2DAE2
oklch(88.5% 0.014 248)
-
Step 300
300
#B5C2D0
oklch(80.8% 0.024 250.1)
-
Step 400
400
#8EA3B9
oklch(70.7% 0.04 249.6)
-
Step 500
500
#728CA7
oklch(63% 0.051 249.6)
-
Step 600
600 (this color)
#57738F
oklch(54.5% 0.055 248.9)
-
Step 700
700
#4A637D
oklch(49% 0.052 249.9)
-
Step 800
800
#3D5165
oklch(42.7% 0.042 248.8)
-
Step 900
900
#344353
oklch(37.7% 0.034 250.4)
-
Step 950
950
#1F2730
oklch(26.9% 0.02 251.6)
#57738F 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) | #687390 | 0.023 |
| Deuteranopia (no green cones) | #616E8E | 0.018 |
| Tritanopia (no blue cones) | #44797C | 0.046 |
| Achromatopsia (no color) | #707070 | 0.055 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #57738F
#57738F
oklch(54.5% 0.055 248.9)
- #856A4D
#856A4D
oklch(54.3% 0.054 68.3)
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 #57738F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Metallic Blue #4F738E ΔE 0.010
- Dull Blue #49759C ΔE 0.024
- Stormy Blue #507B9C ΔE 0.026
- Cerulean #457B9D ΔE 0.030
- Grey Blue #647D8E ΔE 0.036
- Muted Blue #3B719F ΔE 0.040
- Battleship Gray #6C757D ΔE 0.040
- Battleship Grey #6B7C85 ΔE 0.045
Use #57738F 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.