#171810
Closest named color: Rich Black (#0D1B2A). oklch(20.5% 0.015 113.5), rgb(23, 24, 16).
Aa
White text reads best on this color (17.87:1).
About this color
#171810 is a very dark close to neutral grey. In OKLCH its lightness is 21%, its chroma 0.015. It has too little chroma to lean warm or cool. The nearest named color is Rich Black (#0D1B2A), ΔE 0.050 away. White text reads best on it, at 17.87:1.
| Hue family | Neutrals |
| Lightness | very dark (21%) |
| Chroma | close to neutral grey (0.015) |
| Temperature | neutral |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.17:1 |
| White text | 17.87:1 |
Values
| HEX | #171810 |
| RGB | rgb(23, 24, 16) |
| HSL | hsl(68, 20%, 8%) |
| OKLCH | oklch(20.5% 0.015 113.5) |
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 #171810 | 17.87:1 | AAA | Lc -106.8 | Preferred for body text |
| Black text on #171810 | 1.17:1 | Fails | Lc 0.0 | Not readable |
| #171810 text on white | 17.87:1 | AAA | Lc 104.6 | Preferred for body text |
| #171810 text on black | 1.17:1 | Fails | Lc 0.0 | Not readable |
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 950.
-
Step 50
50
#F5F6F4
oklch(97.2% 0.003 128.5)
-
Step 100
100
#EAEAE6
oklch(93.6% 0.005 106.5)
-
Step 200
200
#D9DAD2
oklch(88.5% 0.011 112.4)
-
Step 300
300
#C0C2B5
oklch(80.9% 0.018 113.9)
-
Step 400
400
#A0A38F
oklch(70.7% 0.029 114.1)
-
Step 500
500
#898C73
oklch(63.1% 0.036 113)
-
Step 600
600
#73765B
oklch(55.6% 0.04 112.9)
-
Step 700
700
#60634B
oklch(49% 0.037 113.6)
-
Step 800
800
#4F513E
oklch(42.7% 0.03 112.6)
-
Step 900
900
#414335
oklch(37.7% 0.023 114.1)
-
Step 950
950 (this color)
#171810
oklch(20.5% 0.015 113.5)
#171810 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) | #191710 | 0.005 |
| Deuteranopia (no green cones) | #191710 | 0.005 |
| Tritanopia (no blue cones) | #181716 | 0.014 |
| Achromatopsia (no color) | #171717 | 0.015 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #171810
#171810
oklch(20.5% 0.015 113.5)
- #17161E
#17161E
oklch(20.5% 0.016 290.7)
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 #171810, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.050
- Rich Navy #001219 ΔE 0.053
- Almost Black #070D0D ΔE 0.055
- Jet #212529 ΔE 0.061
- Dark Brown #341C02 ΔE 0.067
- Dark #1B2431 ΔE 0.067
- Very Dark Brown #1D0200 ΔE 0.076
- Oxford Blue #1B263B ΔE 0.085
Use #171810 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.