#1D2D37
Closest named color: Oxford Blue (#1B263B). oklch(28.8% 0.028 236.5), rgb(29, 45, 55).
Aa
White text reads best on this color (14.16:1).
About this color
#1D2D37 is a dark close to neutral grey. In OKLCH its lightness is 29%, its chroma 0.028. It has too little chroma to lean warm or cool. The nearest named color is Oxford Blue (#1B263B), ΔE 0.028 away. White text reads best on it, at 14.16:1.
| Hue family | Neutrals |
| Lightness | dark (29%) |
| Chroma | close to neutral grey (0.028) |
| Temperature | neutral |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.48:1 |
| White text | 14.16:1 |
Values
| HEX | #1D2D37 |
| RGB | rgb(29, 45, 55) |
| HSL | hsl(203, 31%, 16%) |
| OKLCH | oklch(28.8% 0.028 236.5) |
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 #1D2D37 | 14.16:1 | AAA | Lc -103.8 | Preferred for body text |
| Black text on #1D2D37 | 1.48:1 | Fails | Lc 0.0 | Not readable |
| #1D2D37 text on white | 14.16:1 | AAA | Lc 100.8 | Preferred for body text |
| #1D2D37 text on black | 1.48:1 | 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
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E4EBF0
oklch(93.6% 0.01 238.5)
-
Step 200
200
#CEDBE4
oklch(88.4% 0.019 237.8)
-
Step 300
300
#ADC4D4
oklch(80.8% 0.034 238.3)
-
Step 400
400
#81A6BE
oklch(70.6% 0.054 237)
-
Step 500
500
#6090AE
oklch(63.1% 0.069 236.8)
-
Step 600
600
#467A99
oklch(55.6% 0.074 236.3)
-
Step 700
700
#376783
oklch(49.2% 0.069 236.1)
-
Step 800
800
#2E546A
oklch(42.7% 0.057 235.6)
-
Step 900
900
#2A4556
oklch(37.6% 0.044 237.2)
-
Step 950
950 (this color)
#1D2D37
oklch(28.8% 0.028 236.5)
#1D2D37 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) | #282D38 | 0.017 |
| Deuteranopia (no green cones) | #252A37 | 0.015 |
| Tritanopia (no blue cones) | #133030 | 0.023 |
| Achromatopsia (no color) | #2B2B2B | 0.028 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1D2D37
#1D2D37
oklch(28.8% 0.028 236.5)
- #36271D
#36271D
oklch(28.7% 0.029 55)
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 #1D2D37, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.028
- Gunmetal #293241 ΔE 0.030
- Space Cadet #2B2D42 ΔE 0.031
- Dark #1B2431 ΔE 0.031
- Jet #212529 ΔE 0.032
- Midnight Green #073B4C ΔE 0.052
- Dark Blue Grey #1F3B4D ΔE 0.054
- Prussian Blue #1D3557 ΔE 0.059
Use #1D2D37 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.