#231217
Closest named color: Rich Black (#0D1B2A). oklch(20.8% 0.029 0.9), rgb(35, 18, 23).
Aa
White text reads best on this color (17.94:1).
About this color
#231217 is a very dark close to neutral grey. In OKLCH its lightness is 21%, its chroma 0.029. It has too little chroma to lean warm or cool. The nearest named color is Rich Black (#0D1B2A), ΔE 0.054 away. White text reads best on it, at 17.94:1.
| Hue family | Neutrals |
| Lightness | very dark (21%) |
| Chroma | close to neutral grey (0.029) |
| Temperature | neutral |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.17:1 |
| White text | 17.94:1 |
Values
| HEX | #231217 |
| RGB | rgb(35, 18, 23) |
| HSL | hsl(342, 32%, 10%) |
| OKLCH | oklch(20.8% 0.029 0.9) |
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 #231217 | 17.94:1 | AAA | Lc -106.8 | Preferred for body text |
| Black text on #231217 | 1.17:1 | Fails | Lc 0.0 | Not readable |
| #231217 text on white | 17.94:1 | AAA | Lc 104.6 | Preferred for body text |
| #231217 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
#F8F4F5
oklch(97.1% 0.004 360)
-
Step 100
100
#F0E7E9
oklch(93.6% 0.01 2)
-
Step 200
200
#E5D4D8
oklch(88.5% 0.02 1.4)
-
Step 300
300
#D5B8BF
oklch(81% 0.034 1.6)
-
Step 400
400
#BF939E
oklch(70.8% 0.055 2)
-
Step 500
500
#AE7787
oklch(63% 0.072 0.4)
-
Step 600
600
#996071
oklch(55.7% 0.077 0.6)
-
Step 700
700
#824F5E
oklch(49% 0.071 1)
-
Step 800
800
#6A414D
oklch(42.7% 0.059 0.9)
-
Step 900
900
#563740
oklch(37.6% 0.046 0.6)
-
Step 950
950 (this color)
#231217
oklch(20.8% 0.029 0.9)
#231217 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) | #141517 | 0.033 |
| Deuteranopia (no green cones) | #191817 | 0.029 |
| Tritanopia (no blue cones) | #261114 | 0.008 |
| Achromatopsia (no color) | #171717 | 0.030 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #231217
#231217
oklch(20.8% 0.029 0.9)
- #061C19
#061C19
oklch(20.7% 0.029 183.4)
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 #231217, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.054
- Jet #212529 ΔE 0.064
- Dark Maroon #3C0008 ΔE 0.066
- Very Dark Brown #1D0200 ΔE 0.066
- Dark Brown #341C02 ΔE 0.067
- Dark #1B2431 ΔE 0.067
- Almost Black #070D0D ΔE 0.068
- Rich Navy #001219 ΔE 0.069
Use #231217 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.