#55667B
Closest named color: Slate (#516572). oklch(50.4% 0.039 253.9), rgb(85, 102, 123).
Aa
White text reads best on this color (5.87:1).
About this color
#55667B is a medium-dark, muted blue. In OKLCH its lightness is 50%, its chroma 0.039 and its hue 254°. Its hue sits on the cool side of the wheel. The nearest named color is Slate (#516572), ΔE 0.016 away. White text reads best on it, at 5.87:1.
| Hue family | Blues |
| Lightness | medium-dark (50%) |
| Chroma | muted (0.039) |
| Temperature | cool |
| Nearest name | Slate (#516572) |
| Black text | 3.57:1 |
| White text | 5.87:1 |
Values
| HEX | #55667B |
| RGB | rgb(85, 102, 123) |
| HSL | hsl(213, 18%, 41%) |
| OKLCH | oklch(50.4% 0.039 253.9) |
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 #55667B | 5.87:1 | AA | Lc -84.6 | Fine for body text |
| Black text on #55667B | 3.57:1 | AA large text | Lc 24.7 | Dividers and decoration only |
| #55667B text on white | 5.87:1 | AA | Lc 79.4 | Fine for body text |
| #55667B text on black | 3.57:1 | AA large text | Lc -22.4 | 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 700.
-
Step 50
50
#F4F5F7
oklch(97% 0.003 264.5)
-
Step 100
100
#E7EAED
oklch(93.6% 0.005 247.9)
-
Step 200
200
#D4DAE0
oklch(88.6% 0.011 247.9)
-
Step 300
300
#B8C2CD
oklch(81% 0.019 250.6)
-
Step 400
400
#94A2B4
oklch(70.7% 0.031 254.7)
-
Step 500
500
#798BA1
oklch(63% 0.039 253.6)
-
Step 600
600
#62758C
oklch(55.6% 0.042 253.4)
-
Step 700
700 (this color)
#55667B
oklch(50.4% 0.039 253.9)
-
Step 800
800
#435061
oklch(42.7% 0.033 255.2)
-
Step 900
900
#38434F
oklch(37.8% 0.025 250.7)
-
Step 950
950
#21272E
oklch(27% 0.016 252.4)
#55667B 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) | #5E677C | 0.014 |
| Deuteranopia (no green cones) | #5A637B | 0.011 |
| Tritanopia (no blue cones) | #4A6B6D | 0.035 |
| Achromatopsia (no color) | #646464 | 0.039 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #55667B
#55667B
oklch(50.4% 0.039 253.9)
- #72614B
#72614B
oklch(50.3% 0.04 73.9)
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 #55667B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate #516572 ΔE 0.016
- Metallic Blue #4F738E ΔE 0.041
- Dim Gray #696969 ΔE 0.043
- Dusty Grape #545775 ΔE 0.044
- Denim #3B638C ΔE 0.044
- YInMn Blue #415A77 ΔE 0.048
- Dusky Blue #475F94 ΔE 0.054
- Battleship Gray #6C757D ΔE 0.058
Use #55667B 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.