#1D273B
Closest named color: Oxford Blue (#1B263B). oklch(27.3% 0.04 263.6), rgb(29, 39, 59).
Aa
White text reads best on this color (14.94:1).
About this color
#1D273B is a dark, muted blue. In OKLCH its lightness is 27%, its chroma 0.040 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.005 away. White text reads best on it, at 14.94:1.
| Hue family | Blues |
| Lightness | dark (27%) |
| Chroma | muted (0.040) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.40:1 |
| White text | 14.94:1 |
Values
| HEX | #1D273B |
| RGB | rgb(29, 39, 59) |
| HSL | hsl(220, 34%, 17%) |
| OKLCH | oklch(27.3% 0.04 263.6) |
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 #1D273B | 14.94:1 | AAA | Lc -104.6 | Preferred for body text |
| Black text on #1D273B | 1.40:1 | Fails | Lc 0.0 | Not readable |
| #1D273B text on white | 14.94:1 | AAA | Lc 101.8 | Preferred for body text |
| #1D273B 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
#F3F5FA
oklch(97% 0.007 268.5)
-
Step 100
100
#E5EAF3
oklch(93.6% 0.013 262.4)
-
Step 200
200
#D0D9EB
oklch(88.4% 0.027 264.4)
-
Step 300
300
#B1C1E0
oklch(80.9% 0.047 263.7)
-
Step 400
400
#88A1D1
oklch(70.8% 0.076 263.2)
-
Step 500
500
#6B89C4
oklch(63.2% 0.096 263.2)
-
Step 600
600
#5372B1
oklch(55.7% 0.105 263.5)
-
Step 700
700
#435F98
oklch(49.1% 0.098 263.4)
-
Step 800
800
#384E7B
oklch(42.8% 0.08 263.6)
-
Step 900
900
#304163
oklch(37.7% 0.063 263.4)
-
Step 950
950 (this color)
#1D273B
oklch(27.3% 0.04 263.6)
#1D273B 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) | #20293C | 0.009 |
| Deuteranopia (no green cones) | #1D263B | 0.003 |
| Tritanopia (no blue cones) | #122B2E | 0.035 |
| Achromatopsia (no color) | #272727 | 0.040 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1D273B
#1D273B
oklch(27.3% 0.04 263.6)
- #31250F
#31250F
oklch(27.3% 0.039 81)
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 #1D273B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.005
- Dark #1B2431 ΔE 0.020
- Jet #212529 ΔE 0.033
- Space Cadet #2B2D42 ΔE 0.033
- Gunmetal #293241 ΔE 0.043
- Rich Black #0D1B2A ΔE 0.056
- Prussian Blue #1D3557 ΔE 0.061
- Midnight Green #073B4C ΔE 0.067
Use #1D273B 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.