#1F2831
Closest named color: Jet (#212529). oklch(27.2% 0.021 248.6), rgb(31, 40, 49).
Aa
White text reads best on this color (14.93:1).
About this color
#1F2831 is a dark close to neutral grey. In OKLCH its lightness is 27%, its chroma 0.021. It has too little chroma to lean warm or cool. The nearest named color is Jet (#212529), ΔE 0.015 away. White text reads best on it, at 14.93:1.
| Hue family | Neutrals |
| Lightness | dark (27%) |
| Chroma | close to neutral grey (0.021) |
| Temperature | neutral |
| Nearest name | Jet (#212529) |
| Black text | 1.40:1 |
| White text | 14.93:1 |
Values
| HEX | #1F2831 |
| RGB | rgb(31, 40, 49) |
| HSL | hsl(210, 23%, 16%) |
| OKLCH | oklch(27.2% 0.021 248.6) |
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 #1F2831 | 14.93:1 | AAA | Lc -104.6 | Preferred for body text |
| Black text on #1F2831 | 1.40:1 | Fails | Lc 0.0 | Not readable |
| #1F2831 text on white | 14.93:1 | AAA | Lc 101.8 | Preferred for body text |
| #1F2831 text on black | 1.40:1 | 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
#F4F6F8
oklch(97.2% 0.003 247.9)
-
Step 100
100
#E6EAEE
oklch(93.5% 0.007 247.9)
-
Step 200
200
#D2DAE2
oklch(88.5% 0.014 248)
-
Step 300
300
#B5C2D0
oklch(80.8% 0.024 250.1)
-
Step 400
400
#8EA3B9
oklch(70.7% 0.04 249.6)
-
Step 500
500
#728DA7
oklch(63.2% 0.05 247.6)
-
Step 600
600
#5A7693
oklch(55.5% 0.056 249.7)
-
Step 700
700
#4A637D
oklch(49% 0.052 249.9)
-
Step 800
800
#3D5166
oklch(42.7% 0.043 250.1)
-
Step 900
900
#344353
oklch(37.7% 0.034 250.4)
-
Step 950
950 (this color)
#1F2831
oklch(27.2% 0.021 248.6)
#1F2831 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) | #252831 | 0.010 |
| Deuteranopia (no green cones) | #222631 | 0.008 |
| Tritanopia (no blue cones) | #1A2A2B | 0.017 |
| Achromatopsia (no color) | #272727 | 0.021 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1F2831
#1F2831
oklch(27.2% 0.021 248.6)
- #2E251C
#2E251C
oklch(27.2% 0.021 66.8)
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 #1F2831, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Jet #212529 ΔE 0.015
- Dark #1B2431 ΔE 0.016
- Oxford Blue #1B263B ΔE 0.023
- Space Cadet #2B2D42 ΔE 0.040
- Gunmetal #293241 ΔE 0.044
- Rich Black #0D1B2A ΔE 0.056
- Midnight Green #073B4C ΔE 0.070
- Dark Blue Grey #1F3B4D ΔE 0.071
Use #1F2831 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.