#5B657C
Closest named color: Slate (#516572). oklch(50.7% 0.039 266.6), rgb(91, 101, 124).
Aa
White text reads best on this color (5.83:1).
About this color
#5B657C is a medium-dark, muted blue. In OKLCH its lightness is 51%, its chroma 0.039 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is Slate (#516572), ΔE 0.023 away. White text reads best on it, at 5.83:1.
| Hue family | Blues |
| Lightness | medium-dark (51%) |
| Chroma | muted (0.039) |
| Temperature | cool |
| Nearest name | Slate (#516572) |
| Black text | 3.59:1 |
| White text | 5.83:1 |
Values
| HEX | #5B657C |
| RGB | rgb(91, 101, 124) |
| HSL | hsl(222, 15%, 42%) |
| OKLCH | oklch(50.7% 0.039 266.6) |
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 #5B657C | 5.83:1 | AA | Lc -84.4 | Fine for body text |
| Black text on #5B657C | 3.59:1 | AA large text | Lc 24.9 | Dividers and decoration only |
| #5B657C text on white | 5.83:1 | AA | Lc 79.2 | Fine for body text |
| #5B657C text on black | 3.59:1 | AA large text | Lc -22.6 | 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 700.
-
Step 50
50
#F5F5F7
oklch(97.1% 0.003 286.4)
-
Step 100
100
#E8EAEE
oklch(93.7% 0.006 264.5)
-
Step 200
200
#D6D9E0
oklch(88.5% 0.01 267.4)
-
Step 300
300
#BBC1CD
oklch(81% 0.018 264.5)
-
Step 400
400
#98A1B4
oklch(70.8% 0.03 265.4)
-
Step 500
500
#7F89A1
oklch(63% 0.038 267.4)
-
Step 600
600
#68738C
oklch(55.6% 0.041 266.4)
-
Step 700
700 (this color)
#5B657C
oklch(50.7% 0.039 266.6)
-
Step 800
800
#474F61
oklch(42.8% 0.032 266.2)
-
Step 900
900
#3B414F
oklch(37.5% 0.025 266.9)
-
Step 950
950
#23262E
oklch(26.9% 0.016 269.1)
#5B657C 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) | #5E677D | 0.008 |
| Deuteranopia (no green cones) | #5B647B | 0.003 |
| Tritanopia (no blue cones) | #52696D | 0.033 |
| Achromatopsia (no color) | #656565 | 0.039 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B657C
#5B657C
oklch(50.7% 0.039 266.6)
- #6F644C
#6F644C
oklch(50.7% 0.039 86.2)
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 #5B657C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate #516572 ΔE 0.023
- Dim Gray #696969 ΔE 0.041
- Dusty Grape #545775 ΔE 0.043
- Metallic Blue #4F738E ΔE 0.043
- Denim #3B638C ΔE 0.048
- YInMn Blue #415A77 ΔE 0.052
- Dusky Blue #475F94 ΔE 0.054
- Battleship Gray #6C757D ΔE 0.056
Use #5B657C 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.