#51645A
Closest named color: Slate (#516572). oklch(48.4% 0.028 162.2), rgb(81, 100, 90).
Aa
White text reads best on this color (6.32:1).
About this color
#51645A is a medium-dark close to neutral grey. In OKLCH its lightness is 48%, its chroma 0.028. It has too little chroma to lean warm or cool. The nearest named color is Slate (#516572), ΔE 0.038 away. White text reads best on it, at 6.32:1.
| Hue family | Neutrals |
| Lightness | medium-dark (48%) |
| Chroma | close to neutral grey (0.028) |
| Temperature | neutral |
| Nearest name | Slate (#516572) |
| Black text | 3.32:1 |
| White text | 6.32:1 |
Values
| HEX | #51645A |
| RGB | rgb(81, 100, 90) |
| HSL | hsl(148, 10%, 35%) |
| OKLCH | oklch(48.4% 0.028 162.2) |
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 #51645A | 6.32:1 | AA | Lc -86.6 | Fine for body text |
| Black text on #51645A | 3.32:1 | AA large text | Lc 22.6 | Dividers and decoration only |
| #51645A text on white | 6.32:1 | AA | Lc 81.5 | Fine for body text |
| #51645A text on black | 3.32:1 | AA large text | Lc -20.4 | 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
#F4F6F5
oklch(97.1% 0.002 165.1)
-
Step 100
100
#E8EBE9
oklch(93.7% 0.004 157.2)
-
Step 200
200
#D5DBD7
oklch(88.6% 0.008 157.1)
-
Step 300
300
#B9C3BE
oklch(80.8% 0.013 164.7)
-
Step 400
400
#95A59C
oklch(70.7% 0.022 161.2)
-
Step 500
500
#7B8F84
oklch(63.1% 0.028 161.5)
-
Step 600
600
#64796E
oklch(55.6% 0.03 162.5)
-
Step 700
700 (this color)
#51645A
oklch(48.4% 0.028 162.2)
-
Step 800
800
#44534B
oklch(42.7% 0.023 162)
-
Step 900
900
#39453F
oklch(37.8% 0.019 163.8)
-
Step 950
950
#222825
oklch(27% 0.01 164.1)
#51645A 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) | #63615A | 0.027 |
| Deuteranopia (no green cones) | #605F5B | 0.026 |
| Tritanopia (no blue cones) | #4E6461 | 0.011 |
| Achromatopsia (no color) | #606060 | 0.028 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51645A
#51645A
oklch(48.4% 0.028 162.2)
- #6B5963
#6B5963
oklch(48.5% 0.028 343.7)
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 #51645A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate #516572 ΔE 0.038
- Dim Gray #696969 ΔE 0.046
- Dark Green Blue #1F6357 ΔE 0.054
- Dark Aqua #05696B ΔE 0.060
- Dark Moss Green #606C38 ΔE 0.063
- Dark Aquamarine #017371 ΔE 0.066
- Deep Turquoise #017374 ΔE 0.067
- YInMn Blue #415A77 ΔE 0.068
Use #51645A 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.