#1F232F
Closest named color: Dark (#1B2431). oklch(25.8% 0.023 270.3), rgb(31, 35, 47).
Aa
White text reads best on this color (15.67:1).
About this color
#1F232F is a dark close to neutral grey. In OKLCH its lightness is 26%, its chroma 0.023. It has too little chroma to lean warm or cool. The nearest named color is Dark (#1B2431), ΔE 0.007 away. White text reads best on it, at 15.67:1.
| Hue family | Neutrals |
| Lightness | dark (26%) |
| Chroma | close to neutral grey (0.023) |
| Temperature | neutral |
| Nearest name | Dark (#1B2431) |
| Black text | 1.33:1 |
| White text | 15.67:1 |
Values
| HEX | #1F232F |
| RGB | rgb(31, 35, 47) |
| HSL | hsl(225, 21%, 15%) |
| OKLCH | oklch(25.8% 0.023 270.3) |
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 #1F232F | 15.67:1 | AAA | Lc -105.3 | Preferred for body text |
| Black text on #1F232F | 1.33:1 | Fails | Lc 0.0 | Not readable |
| #1F232F text on white | 15.67:1 | AAA | Lc 102.6 | Preferred for body text |
| #1F232F 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
#F4F5F8
oklch(97% 0.004 271.4)
-
Step 100
100
#E8EAEF
oklch(93.7% 0.007 268.5)
-
Step 200
200
#D5D9E4
oklch(88.5% 0.016 270)
-
Step 300
300
#B9C0D3
oklch(80.8% 0.028 269.6)
-
Step 400
400
#96A0BD
oklch(70.8% 0.044 270.3)
-
Step 500
500
#7C88AD
oklch(63.1% 0.058 270.7)
-
Step 600
600
#657298
oklch(55.6% 0.061 269.7)
-
Step 700
700
#545F82
oklch(49.1% 0.058 270.7)
-
Step 800
800
#454E69
oklch(42.7% 0.046 270.1)
-
Step 900
900
#3A4156
oklch(37.8% 0.037 270.2)
-
Step 950
950 (this color)
#1F232F
oklch(25.8% 0.023 270.3)
#1F232F 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) | #1F2430 | 0.004 |
| Deuteranopia (no green cones) | #1E232F | 0.002 |
| Tritanopia (no blue cones) | #1B2527 | 0.020 |
| Achromatopsia (no color) | #232323 | 0.023 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1F232F
#1F232F
oklch(25.8% 0.023 270.3)
- #282316
#282316
oklch(25.8% 0.024 89.4)
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 #1F232F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark #1B2431 ΔE 0.007
- Jet #212529 ΔE 0.016
- Oxford Blue #1B263B ΔE 0.023
- Rich Black #0D1B2A ΔE 0.043
- Space Cadet #2B2D42 ΔE 0.050
- Gunmetal #293241 ΔE 0.058
- Dark Brown #341C02 ΔE 0.076
- Prussian Blue #1D3557 ΔE 0.083
Use #1F232F 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.