#1D2738
Closest named color: Oxford Blue (#1B263B). oklch(27.2% 0.035 260.8), rgb(29, 39, 56).
Aa
White text reads best on this color (15.00:1).
About this color
#1D2738 is a dark, muted blue. In OKLCH its lightness is 27%, its chroma 0.035 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.008 away. White text reads best on it, at 15.00:1.
| Hue family | Blues |
| Lightness | dark (27%) |
| Chroma | muted (0.035) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.39:1 |
| White text | 15.00:1 |
Values
| HEX | #1D2738 |
| RGB | rgb(29, 39, 56) |
| HSL | hsl(218, 32%, 17%) |
| OKLCH | oklch(27.2% 0.035 260.8) |
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 #1D2738 | 15.00:1 | AAA | Lc -104.6 | Preferred for body text |
| Black text on #1D2738 | 1.39:1 | Fails | Lc 0.0 | Not readable |
| #1D2738 text on white | 15.00:1 | AAA | Lc 101.9 | Preferred for body text |
| #1D2738 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
#F3F5F9
oklch(97% 0.006 264.5)
-
Step 100
100
#E5EAF2
oklch(93.6% 0.012 259.8)
-
Step 200
200
#D1DAE9
oklch(88.6% 0.023 260.7)
-
Step 300
300
#B2C2DC
oklch(81% 0.041 260.1)
-
Step 400
400
#89A2CA
oklch(70.8% 0.065 259.7)
-
Step 500
500
#6C8ABD
oklch(63.1% 0.085 260.8)
-
Step 600
600
#5473A9
oklch(55.5% 0.092 261)
-
Step 700
700
#446191
oklch(49.2% 0.085 260.1)
-
Step 800
800
#384F76
oklch(42.7% 0.071 260.6)
-
Step 900
900
#31425F
oklch(37.8% 0.055 260.8)
-
Step 950
950 (this color)
#1D2738
oklch(27.2% 0.035 260.8)
#1D2738 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) | #212839 | 0.008 |
| Deuteranopia (no green cones) | #1E2638 | 0.004 |
| Tritanopia (no blue cones) | #142B2D | 0.031 |
| Achromatopsia (no color) | #272727 | 0.035 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1D2738
#1D2738
oklch(27.2% 0.035 260.8)
- #302512
#302512
oklch(27.2% 0.035 80.1)
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 #1D2738, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.008
- Dark #1B2431 ΔE 0.016
- Jet #212529 ΔE 0.027
- Space Cadet #2B2D42 ΔE 0.036
- Gunmetal #293241 ΔE 0.044
- Rich Black #0D1B2A ΔE 0.054
- Prussian Blue #1D3557 ΔE 0.065
- Midnight Green #073B4C ΔE 0.068
Use #1D2738 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.