#51617E
Closest named color: Slate (#516572). oklch(49.1% 0.051 262.1), rgb(81, 97, 126).
Aa
White text reads best on this color (6.24:1).
About this color
#51617E is a medium-dark, muted blue. In OKLCH its lightness is 49%, its chroma 0.051 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Slate (#516572), ΔE 0.026 away. White text reads best on it, at 6.24:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | muted (0.051) |
| Temperature | cool |
| Nearest name | Slate (#516572) |
| Black text | 3.36:1 |
| White text | 6.24:1 |
Values
| HEX | #51617E |
| RGB | rgb(81, 97, 126) |
| HSL | hsl(219, 22%, 41%) |
| OKLCH | oklch(49.1% 0.051 262.1) |
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 #51617E | 6.24:1 | AA | Lc -86.3 | Fine for body text |
| Black text on #51617E | 3.36:1 | AA large text | Lc 22.9 | Dividers and decoration only |
| #51617E text on white | 6.24:1 | AA | Lc 81.1 | Fine for body text |
| #51617E text on black | 3.36:1 | AA large text | Lc -20.7 | 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
#E7EAEF
oklch(93.6% 0.007 260.7)
-
Step 200
200
#D4D9E2
oklch(88.4% 0.013 262.4)
-
Step 300
300
#B8C1D1
oklch(80.9% 0.025 262.1)
-
Step 400
400
#93A1BA
oklch(70.6% 0.04 262.1)
-
Step 500
500
#798AA9
oklch(63.1% 0.051 262.4)
-
Step 600
600
#627494
oklch(55.7% 0.054 261.8)
-
Step 700
700 (this color)
#51617E
oklch(49.1% 0.051 262.1)
-
Step 800
800
#424F66
oklch(42.6% 0.042 261.7)
-
Step 900
900
#384253
oklch(37.7% 0.032 261)
-
Step 950
950
#212731
oklch(27.1% 0.021 260.6)
#51617E 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) | #57637F | 0.011 |
| Deuteranopia (no green cones) | #535F7D | 0.006 |
| Tritanopia (no blue cones) | #43676B | 0.045 |
| Achromatopsia (no color) | #606060 | 0.051 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51617E
#51617E
oklch(49.1% 0.051 262.1)
- #6F5E3F
#6F5E3F
oklch(49.1% 0.051 82)
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 #51617E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate #516572 ΔE 0.026
- Dusty Grape #545775 ΔE 0.029
- Denim #3B638C ΔE 0.032
- YInMn Blue #415A77 ΔE 0.033
- Dusky Blue #475F94 ΔE 0.040
- Dusk #4E5481 ΔE 0.041
- Denim Blue #3B5B92 ΔE 0.050
- Light Navy Blue #2E5A88 ΔE 0.052
Use #51617E 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.