#55778C
Closest named color: Metallic Blue (#4F738E). oklch(55.2% 0.051 236), rgb(85, 119, 140).
Aa
White text reads best on this color (4.76:1).
About this color
#55778C is a medium-dark, muted blue. In OKLCH its lightness is 55%, its chroma 0.051 and its hue 236°. Its hue sits on the cool side of the wheel. The nearest named color is Metallic Blue (#4F738E), ΔE 0.016 away. White text reads best on it, at 4.76:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | muted (0.051) |
| Temperature | cool |
| Nearest name | Metallic Blue (#4F738E) |
| Black text | 4.40:1 |
| White text | 4.76:1 |
Values
| HEX | #55778C |
| RGB | rgb(85, 119, 140) |
| HSL | hsl(203, 24%, 44%) |
| OKLCH | oklch(55.2% 0.051 236) |
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 #55778C | 4.76:1 | AA | Lc -78.5 | Fine for body text |
| Black text on #55778C | 4.40:1 | AA large text | Lc 31.0 | Non-text elements, placeholder text |
| #55778C text on white | 4.76:1 | AA | Lc 73.1 | Content text, not long reading |
| #55778C text on black | 4.40:1 | AA large text | Lc -28.6 | 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
#F4F6F7
oklch(97.2% 0.003 228.8)
-
Step 100
100
#E6EBEE
oklch(93.7% 0.007 233.6)
-
Step 200
200
#D2DBE0
oklch(88.6% 0.012 231.7)
-
Step 300
300
#B3C3CE
oklch(80.8% 0.023 237.7)
-
Step 400
400
#8CA5B5
oklch(70.8% 0.036 236.1)
-
Step 500
500
#6F8EA2
oklch(63% 0.046 236.8)
-
Step 600
600 (this color)
#55778C
oklch(55.2% 0.051 236)
-
Step 700
700
#466578
oklch(49% 0.047 235.9)
-
Step 800
800
#3A5362
oklch(42.8% 0.039 235.2)
-
Step 900
900
#324450
oklch(37.6% 0.031 237.8)
-
Step 950
950
#1D282F
oklch(27% 0.02 236.4)
#55778C 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) | #6D768D | 0.032 |
| Deuteranopia (no green cones) | #66708C | 0.028 |
| Tritanopia (no blue cones) | #417C7E | 0.038 |
| Achromatopsia (no color) | #737373 | 0.051 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #55778C
#55778C
oklch(55.2% 0.051 236)
- #8A6B55
#8A6B55
oklch(55.3% 0.051 56.8)
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 #55778C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Metallic Blue #4F738E ΔE 0.016
- Stormy Blue #507B9C ΔE 0.025
- Grey Blue #647D8E ΔE 0.027
- Cerulean #457B9D ΔE 0.029
- Dull Blue #49759C ΔE 0.030
- Battleship Gray #6C757D ΔE 0.035
- Battleship Grey #6B7C85 ΔE 0.036
- Slate Gray #708090 ΔE 0.046
Use #55778C 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.