#17121A
Closest named color: Rich Black (#0D1B2A). oklch(19.2% 0.018 312.7), rgb(23, 18, 26).
Aa
White text reads best on this color (18.45:1).
About this color
#17121A is a very dark close to neutral grey. In OKLCH its lightness is 19%, its chroma 0.018. It has too little chroma to lean warm or cool. The nearest named color is Rich Black (#0D1B2A), ΔE 0.040 away. White text reads best on it, at 18.45:1.
| Hue family | Neutrals |
| Lightness | very dark (19%) |
| Chroma | close to neutral grey (0.018) |
| Temperature | neutral |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.13:1 |
| White text | 18.45:1 |
Values
| HEX | #17121A |
| RGB | rgb(23, 18, 26) |
| HSL | hsl(278, 18%, 9%) |
| OKLCH | oklch(19.2% 0.018 312.7) |
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 #17121A | 18.45:1 | AAA | Lc -107.2 | Preferred for body text |
| Black text on #17121A | 1.13:1 | Fails | Lc 0.0 | Not readable |
| #17121A text on white | 18.45:1 | AAA | Lc 105.1 | Preferred for body text |
| #17121A text on black | 1.13:1 | 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
#F6F5F7
oklch(97.1% 0.003 308.4)
-
Step 100
100
#EBE9ED
oklch(93.7% 0.006 308.4)
-
Step 200
200
#DCD7DF
oklch(88.5% 0.012 313.2)
-
Step 300
300
#C5BDCA
oklch(80.9% 0.02 312.8)
-
Step 400
400
#A89BB0
oklch(70.7% 0.033 312.8)
-
Step 500
500
#92829C
oklch(63% 0.043 312.5)
-
Step 600
600
#7D6C87
oklch(55.7% 0.046 313)
-
Step 700
700
#695A73
oklch(49.1% 0.043 311.7)
-
Step 800
800
#56495D
oklch(42.6% 0.036 313.7)
-
Step 900
900
#473D4C
oklch(37.6% 0.028 314.5)
-
Step 950
950 (this color)
#17121A
oklch(19.2% 0.018 312.7)
#17121A 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) | #11141A | 0.013 |
| Deuteranopia (no green cones) | #12141A | 0.012 |
| Tritanopia (no blue cones) | #171315 | 0.012 |
| Achromatopsia (no color) | #141414 | 0.018 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #17121A
#17121A
oklch(19.2% 0.018 312.7)
- #11160E
#11160E
oklch(19.2% 0.017 133.9)
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 #17121A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.040
- Rich Navy #001219 ΔE 0.043
- Almost Black #070D0D ΔE 0.046
- Very Dark Brown #1D0200 ΔE 0.068
- Dark #1B2431 ΔE 0.070
- Jet #212529 ΔE 0.072
- Very Dark Purple #2A0134 ΔE 0.083
- Oxford Blue #1B263B ΔE 0.084
Use #17121A 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.