#557183
Closest named color: Metallic Blue (#4F738E). oklch(53.4% 0.043 236.8), rgb(85, 113, 131).
Aa
White text reads best on this color (5.15:1).
About this color
#557183 is a medium-dark, muted blue. In OKLCH its lightness is 53%, its chroma 0.043 and its hue 237°. Its hue sits on the cool side of the wheel. The nearest named color is Metallic Blue (#4F738E), ΔE 0.017 away. White text reads best on it, at 5.15:1.
| Hue family | Blues |
| Lightness | medium-dark (53%) |
| Chroma | muted (0.043) |
| Temperature | cool |
| Nearest name | Metallic Blue (#4F738E) |
| Black text | 4.07:1 |
| White text | 5.15:1 |
Values
| HEX | #557183 |
| RGB | rgb(85, 113, 131) |
| HSL | hsl(203, 21%, 42%) |
| OKLCH | oklch(53.4% 0.043 236.8) |
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 #557183 | 5.15:1 | AA | Lc -80.8 | Fine for body text |
| Black text on #557183 | 4.07:1 | AA large text | Lc 28.6 | Dividers and decoration only |
| #557183 text on white | 5.15:1 | AA | Lc 75.5 | Fine for body text |
| #557183 text on black | 4.07:1 | AA large text | Lc -26.3 | 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 600.
-
Step 50
50
#F4F6F7
oklch(97.2% 0.003 228.8)
-
Step 100
100
#E6EAED
oklch(93.5% 0.006 239.8)
-
Step 200
200
#D3DADF
oklch(88.4% 0.01 238.5)
-
Step 300
300
#B5C3CC
oklch(80.9% 0.02 235.8)
-
Step 400
400
#8FA4B2
oklch(70.7% 0.031 237.1)
-
Step 500
500
#738E9F
oklch(63.2% 0.04 235.9)
-
Step 600
600 (this color)
#557183
oklch(53.4% 0.043 236.8)
-
Step 700
700
#4B6575
oklch(49.2% 0.04 235.7)
-
Step 800
800
#3E525F
oklch(42.7% 0.033 237)
-
Step 900
900
#35444E
oklch(37.8% 0.026 237.6)
-
Step 950
950
#1F282E
oklch(27.1% 0.017 237.4)
#557183 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) | #697084 | 0.027 |
| Deuteranopia (no green cones) | #636B83 | 0.024 |
| Tritanopia (no blue cones) | #467677 | 0.033 |
| Achromatopsia (no color) | #6D6D6D | 0.043 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #557183
#557183
oklch(53.4% 0.043 236.8)
- #816755
#816755
oklch(53.4% 0.043 56.3)
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 #557183, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Metallic Blue #4F738E ΔE 0.017
- Battleship Gray #6C757D ΔE 0.036
- Dull Blue #49759C ΔE 0.039
- Slate #516572 ΔE 0.040
- Stormy Blue #507B9C ΔE 0.042
- Grey Blue #647D8E ΔE 0.043
- Cerulean #457B9D ΔE 0.044
- Dim Gray #696969 ΔE 0.045
Use #557183 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.