#1A151F
Closest named color: Rich Black (#0D1B2A). oklch(20.6% 0.021 307.3), rgb(26, 21, 31).
Aa
White text reads best on this color (17.93:1).
About this color
#1A151F is a very dark close to neutral grey. In OKLCH its lightness is 21%, its chroma 0.021. It has too little chroma to lean warm or cool. The nearest named color is Rich Black (#0D1B2A), ΔE 0.032 away. White text reads best on it, at 17.93:1.
| Hue family | Neutrals |
| Lightness | very dark (21%) |
| Chroma | close to neutral grey (0.021) |
| Temperature | neutral |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.17:1 |
| White text | 17.93:1 |
Values
| HEX | #1A151F |
| RGB | rgb(26, 21, 31) |
| HSL | hsl(270, 19%, 10%) |
| OKLCH | oklch(20.6% 0.021 307.3) |
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 #1A151F | 17.93:1 | AAA | Lc -106.9 | Preferred for body text |
| Black text on #1A151F | 1.17:1 | Fails | Lc 0.0 | Not readable |
| #1A151F text on white | 17.93:1 | AAA | Lc 104.7 | Preferred for body text |
| #1A151F 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
#F6F5F7
oklch(97.1% 0.003 308.4)
-
Step 100
100
#EBE9EE
oklch(93.7% 0.007 304.2)
-
Step 200
200
#DBD7E0
oklch(88.5% 0.013 306)
-
Step 300
300
#C5BDCD
oklch(81% 0.024 308.1)
-
Step 400
400
#A79AB4
oklch(70.6% 0.04 307.8)
-
Step 500
500
#9282A2
oklch(63.2% 0.051 307.6)
-
Step 600
600
#7C6B8D
oklch(55.6% 0.055 307.4)
-
Step 700
700
#685978
oklch(49% 0.052 306.6)
-
Step 800
800
#554961
oklch(42.7% 0.042 307.4)
-
Step 900
900
#463D4F
oklch(37.6% 0.032 307.5)
-
Step 950
950 (this color)
#1A151F
oklch(20.6% 0.021 307.3)
#1A151F 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) | #13171F | 0.015 |
| Deuteranopia (no green cones) | #14171F | 0.013 |
| Tritanopia (no blue cones) | #191618 | 0.016 |
| Achromatopsia (no color) | #171717 | 0.021 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1A151F
#1A151F
oklch(20.6% 0.021 307.3)
- #15190F
#15190F
oklch(20.6% 0.02 125.8)
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 #1A151F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.032
- Rich Navy #001219 ΔE 0.052
- Dark #1B2431 ΔE 0.056
- Jet #212529 ΔE 0.058
- Almost Black #070D0D ΔE 0.060
- Oxford Blue #1B263B ΔE 0.070
- Very Dark Purple #2A0134 ΔE 0.078
- Very Dark Brown #1D0200 ΔE 0.079
Use #1A151F 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.