#1F232B
Closest named color: Jet (#212529). oklch(25.6% 0.016 264.2), rgb(31, 35, 43).
Aa
White text reads best on this color (15.74:1).
About this color
#1F232B is a dark close to neutral grey. In OKLCH its lightness is 26%, its chroma 0.016. It has too little chroma to lean warm or cool. The nearest named color is Jet (#212529), ΔE 0.010 away. White text reads best on it, at 15.74:1.
| Hue family | Neutrals |
| Lightness | dark (26%) |
| Chroma | close to neutral grey (0.016) |
| Temperature | neutral |
| Nearest name | Jet (#212529) |
| Black text | 1.33:1 |
| White text | 15.74:1 |
Values
| HEX | #1F232B |
| RGB | rgb(31, 35, 43) |
| HSL | hsl(220, 16%, 15%) |
| OKLCH | oklch(25.6% 0.016 264.2) |
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 #1F232B | 15.74:1 | AAA | Lc -105.3 | Preferred for body text |
| Black text on #1F232B | 1.33:1 | Fails | Lc 0.0 | Not readable |
| #1F232B text on white | 15.74:1 | AAA | Lc 102.7 | Preferred for body text |
| #1F232B text on black | 1.33:1 | 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
#F4F5F7
oklch(97% 0.003 264.5)
-
Step 100
100
#E8EAEE
oklch(93.7% 0.006 264.5)
-
Step 200
200
#D5D9E0
oklch(88.4% 0.011 261.8)
-
Step 300
300
#BAC1CD
oklch(80.9% 0.019 261.3)
-
Step 400
400
#97A1B4
oklch(70.7% 0.03 263.4)
-
Step 500
500
#7E8AA2
oklch(63.2% 0.039 264.2)
-
Step 600
600
#67738D
oklch(55.5% 0.043 265.6)
-
Step 700
700
#556178
oklch(49.1% 0.04 263.3)
-
Step 800
800
#464F61
oklch(42.7% 0.032 264.1)
-
Step 900
900
#3B4250
oklch(37.8% 0.026 264.2)
-
Step 950
950 (this color)
#1F232B
oklch(25.6% 0.016 264.2)
#1F232B 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) | #21232B | 0.003 |
| Deuteranopia (no green cones) | #1F222B | 0.004 |
| Tritanopia (no blue cones) | #1C2526 | 0.015 |
| Achromatopsia (no color) | #232323 | 0.016 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1F232B
#1F232B
oklch(25.6% 0.016 264.2)
- #27221A
#27221A
oklch(25.5% 0.016 79.5)
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 #1F232B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Jet #212529 ΔE 0.010
- Dark #1B2431 ΔE 0.012
- Oxford Blue #1B263B ΔE 0.029
- Rich Black #0D1B2A ΔE 0.043
- Space Cadet #2B2D42 ΔE 0.054
- Gunmetal #293241 ΔE 0.061
- Dark Brown #341C02 ΔE 0.070
- Pakistan Green #283618 ΔE 0.086
Use #1F232B 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.