#1D2C57
Closest named color: Marine (#042E60). oklch(30.5% 0.08 267.1), rgb(29, 44, 87).
Aa
White text reads best on this color (13.54:1).
About this color
#1D2C57 is a dark, moderately saturated blue. In OKLCH its lightness is 31%, its chroma 0.080 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is Marine (#042E60), ΔE 0.026 away. White text reads best on it, at 13.54:1.
| Hue family | Blues |
| Lightness | dark (31%) |
| Chroma | moderately saturated (0.080) |
| Temperature | cool |
| Nearest name | Marine (#042E60) |
| Black text | 1.55:1 |
| White text | 13.54:1 |
Values
| HEX | #1D2C57 |
| RGB | rgb(29, 44, 87) |
| HSL | hsl(224, 50%, 23%) |
| OKLCH | oklch(30.5% 0.08 267.1) |
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 #1D2C57 | 13.54:1 | AAA | Lc -103.0 | Preferred for body text |
| Black text on #1D2C57 | 1.55:1 | Fails | Lc 0.0 | Not readable |
| #1D2C57 text on white | 13.54:1 | AAA | Lc 99.9 | Preferred for body text |
| #1D2C57 text on black | 1.55:1 | 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
#F2F5FE
oklch(97% 0.012 271.3)
-
Step 100
100
#E2EAFD
oklch(93.7% 0.027 267.5)
-
Step 200
200
#CAD9FD
oklch(88.6% 0.052 267.4)
-
Step 300
300
#A5BFFF
oklch(80.9% 0.095 267.2)
-
Step 400
400
#769BFF
oklch(70.7% 0.152 267.2)
-
Step 500
500
#557EFD
oklch(63% 0.194 267.2)
-
Step 600
600
#3D63EC
oklch(55.5% 0.211 267.2)
-
Step 700
700
#3051CD
oklch(49% 0.195 267.2)
-
Step 800
800
#2843A6
oklch(42.6% 0.163 267.3)
-
Step 900
900
#243A84
oklch(37.7% 0.127 267.4)
-
Step 950
950 (this color)
#1D2C57
oklch(30.5% 0.08 267.1)
#1D2C57 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) | #183159 | 0.015 |
| Deuteranopia (no green cones) | #0E2C56 | 0.016 |
| Tritanopia (no blue cones) | #00363D | 0.069 |
| Achromatopsia (no color) | #2E2E2E | 0.080 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1D2C57
#1D2C57
oklch(30.5% 0.08 267.1)
- #3D2C00
#3D2C00
oklch(30.5% 0.062 85.6)
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 #1D2C57, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine #042E60 ΔE 0.026
- Prussian Blue #1D3557 ΔE 0.029
- Space Cadet #2B2D42 ΔE 0.044
- Marine Blue #01386A ΔE 0.047
- Gunmetal #293241 ΔE 0.052
- Oxford Blue #1B263B ΔE 0.052
- Dark Blue Grey #1F3B4D ΔE 0.056
- Midnight Green #073B4C ΔE 0.058
Use #1D2C57 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.