#1D275C
Closest named color: Marine (#042E60). oklch(29.7% 0.095 271.4), rgb(29, 39, 92).
Aa
White text reads best on this color (14.02:1).
About this color
#1D275C is a dark, moderately saturated blue. In OKLCH its lightness is 30%, its chroma 0.095 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Marine (#042E60), ΔE 0.028 away. White text reads best on it, at 14.02:1.
| Hue family | Blues |
| Lightness | dark (30%) |
| Chroma | moderately saturated (0.095) |
| Temperature | cool |
| Nearest name | Marine (#042E60) |
| Black text | 1.49:1 |
| White text | 14.02:1 |
Values
| HEX | #1D275C |
| RGB | rgb(29, 39, 92) |
| HSL | hsl(230, 52%, 24%) |
| OKLCH | oklch(29.7% 0.095 271.4) |
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 #1D275C | 14.02:1 | AAA | Lc -103.5 | Preferred for body text |
| Black text on #1D275C | 1.49:1 | Fails | Lc 0.0 | Not readable |
| #1D275C text on white | 14.02:1 | AAA | Lc 100.5 | Preferred for body text |
| #1D275C text on black | 1.49:1 | 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
#F2F5FF
oklch(97.1% 0.014 272.7)
-
Step 100
100
#E2E9FF
oklch(93.5% 0.031 271.7)
-
Step 200
200
#CBD8FF
oklch(88.5% 0.056 270.7)
-
Step 300
300
#AABDFF
oklch(80.8% 0.096 271.7)
-
Step 400
400
#7F99FF
oklch(70.8% 0.152 271.3)
-
Step 500
500
#617AFF
oklch(63% 0.198 271.6)
-
Step 600
600
#4757FF
oklch(55.5% 0.245 271.3)
-
Step 700
700
#3A44E1
oklch(49.1% 0.232 271.4)
-
Step 800
800
#2F39B6
oklch(42.6% 0.194 271.5)
-
Step 900
900
#283490
oklch(37.7% 0.151 271.3)
-
Step 950
950 (this color)
#1D275C
oklch(29.7% 0.095 271.4)
#1D275C 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) | #042F5E | 0.029 |
| Deuteranopia (no green cones) | #00295B | 0.027 |
| Tritanopia (no blue cones) | #00333D | 0.079 |
| Achromatopsia (no color) | #2C2C2C | 0.095 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1D275C
#1D275C
oklch(29.7% 0.095 271.4)
- #382C00
#382C00
oklch(29.8% 0.061 92.6)
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 #1D275C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine #042E60 ΔE 0.028
- Prussian Blue #1D3557 ΔE 0.045
- Midnight Blue #191970 ΔE 0.049
- Marine Blue #01386A ΔE 0.053
- Space Cadet #2B2D42 ΔE 0.058
- Oxford Blue #1B263B ΔE 0.061
- Gunmetal #293241 ΔE 0.069
- Dark Indigo #1F0954 ΔE 0.070
Use #1D275C 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.