#51607B
Closest named color: Slate (#516572). oklch(48.7% 0.047 262), rgb(81, 96, 123).
Aa
White text reads best on this color (6.34:1).
About this color
#51607B is a medium-dark, muted blue. In OKLCH its lightness is 49%, its chroma 0.047 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Slate (#516572), ΔE 0.024 away. White text reads best on it, at 6.34:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | muted (0.047) |
| Temperature | cool |
| Nearest name | Slate (#516572) |
| Black text | 3.30:1 |
| White text | 6.34:1 |
Values
| HEX | #51607B |
| RGB | rgb(81, 96, 123) |
| HSL | hsl(219, 21%, 40%) |
| OKLCH | oklch(48.7% 0.047 262) |
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 #51607B | 6.34:1 | AA | Lc -86.7 | Fine for body text |
| Black text on #51607B | 3.30:1 | AA large text | Lc 22.5 | Dividers and decoration only |
| #51607B text on white | 6.34:1 | AA | Lc 81.6 | Fine for body text |
| #51607B text on black | 3.30:1 | AA large text | Lc -20.3 | 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 700.
-
Step 50
50
#F4F5F7
oklch(97% 0.003 264.5)
-
Step 100
100
#E7EAEE
oklch(93.6% 0.006 255.5)
-
Step 200
200
#D4D9E2
oklch(88.4% 0.013 262.4)
-
Step 300
300
#B9C1D0
oklch(80.9% 0.023 263.2)
-
Step 400
400
#94A1B8
oklch(70.6% 0.037 261.9)
-
Step 500
500
#7A8AA7
oklch(63.1% 0.048 262.3)
-
Step 600
600
#637492
oklch(55.7% 0.051 261.7)
-
Step 700
700 (this color)
#51607B
oklch(48.7% 0.047 262)
-
Step 800
800
#434F65
oklch(42.6% 0.04 262.4)
-
Step 900
900
#394252
oklch(37.8% 0.03 261.9)
-
Step 950
950
#212730
oklch(27.1% 0.019 258.4)
#51607B 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) | #57627C | 0.011 |
| Deuteranopia (no green cones) | #535E7A | 0.006 |
| Tritanopia (no blue cones) | #456669 | 0.043 |
| Achromatopsia (no color) | #5F5F5F | 0.047 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51607B
#51607B
oklch(48.7% 0.047 262)
- #6D5D40
#6D5D40
oklch(48.6% 0.048 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 #51607B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate #516572 ΔE 0.024
- Dusty Grape #545775 ΔE 0.026
- YInMn Blue #415A77 ΔE 0.030
- Denim #3B638C ΔE 0.035
- Dusk #4E5481 ΔE 0.040
- Dusky Blue #475F94 ΔE 0.043
- Denim Blue #3B5B92 ΔE 0.052
- Light Navy Blue #2E5A88 ΔE 0.053
Use #51607B 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.