#57788C
Closest named color: Metallic Blue (#4F738E). oklch(55.5% 0.049 235.4), rgb(87, 120, 140).
Aa
White text reads best on this color (4.69:1).
About this color
#57788C is a medium-dark, muted blue. In OKLCH its lightness is 56%, its chroma 0.049 and its hue 235°. Its hue sits on the cool side of the wheel. The nearest named color is Metallic Blue (#4F738E), ΔE 0.020 away. White text reads best on it, at 4.69:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | muted (0.049) |
| Temperature | cool |
| Nearest name | Metallic Blue (#4F738E) |
| Black text | 4.47:1 |
| White text | 4.69:1 |
Values
| HEX | #57788C |
| RGB | rgb(87, 120, 140) |
| HSL | hsl(203, 23%, 45%) |
| OKLCH | oklch(55.5% 0.049 235.4) |
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 #57788C | 4.69:1 | AA | Lc -78.0 | Fine for body text |
| Black text on #57788C | 4.47:1 | AA large text | Lc 31.5 | Non-text elements, placeholder text |
| #57788C text on white | 4.69:1 | AA | Lc 72.6 | Content text, not long reading |
| #57788C text on black | 4.47:1 | AA large text | Lc -29.1 | 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
#F4F6F7
oklch(97.2% 0.003 228.8)
-
Step 100
100
#E6EBED
oklch(93.7% 0.006 223.5)
-
Step 200
200
#D2DBE0
oklch(88.6% 0.012 231.7)
-
Step 300
300
#B4C3CD
oklch(80.9% 0.022 236.8)
-
Step 400
400
#8CA5B4
oklch(70.8% 0.035 234.3)
-
Step 500
500
#6F8EA1
oklch(63% 0.045 235.3)
-
Step 600
600 (this color)
#57788C
oklch(55.5% 0.049 235.4)
-
Step 700
700
#476577
oklch(49.1% 0.045 235.3)
-
Step 800
800
#3B5361
oklch(42.8% 0.037 234.4)
-
Step 900
900
#33444F
oklch(37.7% 0.029 236.9)
-
Step 950
950
#1E282E
oklch(27% 0.018 234.7)
#57788C 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) | #6F778D | 0.032 |
| Deuteranopia (no green cones) | #67718C | 0.028 |
| Tritanopia (no blue cones) | #447D7E | 0.038 |
| Achromatopsia (no color) | #747474 | 0.049 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #57788C
#57788C
oklch(55.5% 0.049 235.4)
- #8A6C58
#8A6C58
oklch(55.6% 0.049 55.2)
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 #57788C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Metallic Blue #4F738E ΔE 0.020
- Grey Blue #647D8E ΔE 0.023
- Stormy Blue #507B9C ΔE 0.024
- Cerulean #457B9D ΔE 0.030
- Battleship Grey #6B7C85 ΔE 0.032
- Dull Blue #49759C ΔE 0.033
- Battleship Gray #6C757D ΔE 0.033
- Slate Gray #708090 ΔE 0.042
Use #57788C 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.