#5B6587
Closest named color: Slate (#516572). oklch(51.2% 0.056 271.7), rgb(91, 101, 135).
Aa
White text reads best on this color (5.74:1).
About this color
#5B6587 is a medium-dark, muted blue. In OKLCH its lightness is 51%, its chroma 0.056 and its hue 272°. Its hue sits on the cool side of the wheel. The nearest named color is Slate (#516572), ΔE 0.038 away. White text reads best on it, at 5.74:1.
| Hue family | Blues |
| Lightness | medium-dark (51%) |
| Chroma | muted (0.056) |
| Temperature | cool |
| Nearest name | Slate (#516572) |
| Black text | 3.65:1 |
| White text | 5.74:1 |
Values
| HEX | #5B6587 |
| RGB | rgb(91, 101, 135) |
| HSL | hsl(226, 19%, 44%) |
| OKLCH | oklch(51.2% 0.056 271.7) |
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 #5B6587 | 5.74:1 | AA | Lc -84.0 | Fine for body text |
| Black text on #5B6587 | 3.65:1 | AA large text | Lc 25.3 | Dividers and decoration only |
| #5B6587 text on white | 5.74:1 | AA | Lc 78.7 | Fine for body text |
| #5B6587 text on black | 3.65:1 | AA large text | Lc -23.1 | 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 700.
-
Step 50
50
#F4F5F8
oklch(97% 0.004 271.4)
-
Step 100
100
#E8EAEF
oklch(93.7% 0.007 268.5)
-
Step 200
200
#D5D9E3
oklch(88.5% 0.014 268.5)
-
Step 300
300
#BAC0D3
oklch(80.9% 0.028 271.8)
-
Step 400
400
#97A0BC
oklch(70.8% 0.042 271.2)
-
Step 500
500
#7D88AB
oklch(63.1% 0.054 271.2)
-
Step 600
600
#677297
oklch(55.7% 0.059 271.6)
-
Step 700
700 (this color)
#5B6587
oklch(51.2% 0.056 271.7)
-
Step 800
800
#464E69
oklch(42.8% 0.046 271.6)
-
Step 900
900
#3B4155
oklch(37.8% 0.035 271.6)
-
Step 950
950
#222632
oklch(27% 0.023 270.4)
#5B6587 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) | #5A6889 | 0.008 |
| Deuteranopia (no green cones) | #576486 | 0.007 |
| Tritanopia (no blue cones) | #4F6C71 | 0.050 |
| Achromatopsia (no color) | #666666 | 0.056 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B6587
#5B6587
oklch(51.2% 0.056 271.7)
- #726641
#726641
oklch(51.2% 0.056 92.2)
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 #5B6587, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate #516572 ΔE 0.038
- Metallic Blue #4F738E ΔE 0.041
- Dusky Blue #475F94 ΔE 0.042
- Denim #3B638C ΔE 0.042
- Dusty Grape #545775 ΔE 0.047
- Dull Blue #49759C ΔE 0.051
- Muted Blue #3B719F ΔE 0.053
- Dusk #4E5481 ΔE 0.055
Use #5B6587 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.