#1F2735
Closest named color: Dark (#1B2431). oklch(27.2% 0.029 261.4), rgb(31, 39, 53).
Aa
White text reads best on this color (15.00:1).
About this color
#1F2735 is a dark close to neutral grey. In OKLCH its lightness is 27%, its chroma 0.029. It has too little chroma to lean warm or cool. The nearest named color is Dark (#1B2431), ΔE 0.014 away. White text reads best on it, at 15.00:1.
| Hue family | Neutrals |
| Lightness | dark (27%) |
| Chroma | close to neutral grey (0.029) |
| Temperature | neutral |
| Nearest name | Dark (#1B2431) |
| Black text | 1.39:1 |
| White text | 15.00:1 |
Values
| HEX | #1F2735 |
| RGB | rgb(31, 39, 53) |
| HSL | hsl(218, 26%, 16%) |
| OKLCH | oklch(27.2% 0.029 261.4) |
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 #1F2735 | 15.00:1 | AAA | Lc -104.7 | Preferred for body text |
| Black text on #1F2735 | 1.39:1 | Fails | Lc 0.0 | Not readable |
| #1F2735 text on white | 15.00:1 | AAA | Lc 101.9 | Preferred for body text |
| #1F2735 text on black | 1.39:1 | 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
#F4F5F9
oklch(97.1% 0.005 275)
-
Step 100
100
#E6EAF1
oklch(93.6% 0.01 261.8)
-
Step 200
200
#D2D9E6
oklch(88.4% 0.019 263)
-
Step 300
300
#B5C1D7
oklch(80.9% 0.034 262.7)
-
Step 400
400
#8EA1C3
oklch(70.6% 0.054 262)
-
Step 500
500
#728AB4
oklch(63.1% 0.069 261.4)
-
Step 600
600
#5B74A0
oklch(55.7% 0.075 261.4)
-
Step 700
700
#4A6189
oklch(49.1% 0.07 261.1)
-
Step 800
800
#3D4F6F
oklch(42.7% 0.058 261.6)
-
Step 900
900
#34425A
oklch(37.7% 0.045 261)
-
Step 950
950 (this color)
#1F2735
oklch(27.2% 0.029 261.4)
#1F2735 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) | #222836 | 0.006 |
| Deuteranopia (no green cones) | #202635 | 0.004 |
| Tritanopia (no blue cones) | #182A2C | 0.025 |
| Achromatopsia (no color) | #272727 | 0.029 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1F2735
#1F2735
oklch(27.2% 0.029 261.4)
- #2E2516
#2E2516
oklch(27% 0.029 79.8)
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 #1F2735, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark #1B2431 ΔE 0.014
- Oxford Blue #1B263B ΔE 0.014
- Jet #212529 ΔE 0.022
- Space Cadet #2B2D42 ΔE 0.036
- Gunmetal #293241 ΔE 0.044
- Rich Black #0D1B2A ΔE 0.055
- Prussian Blue #1D3557 ΔE 0.068
- Midnight Green #073B4C ΔE 0.070
Use #1F2735 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.