#1D2D5A
Closest named color: Marine (#042E60). oklch(31% 0.083 266.8), rgb(29, 45, 90).
Aa
White text reads best on this color (13.33:1).
About this color
#1D2D5A is a dark, moderately saturated blue. In OKLCH its lightness is 31%, its chroma 0.083 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is Marine (#042E60), ΔE 0.023 away. White text reads best on it, at 13.33:1.
| Hue family | Blues |
| Lightness | dark (31%) |
| Chroma | moderately saturated (0.083) |
| Temperature | cool |
| Nearest name | Marine (#042E60) |
| Black text | 1.57:1 |
| White text | 13.33:1 |
Values
| HEX | #1D2D5A |
| RGB | rgb(29, 45, 90) |
| HSL | hsl(224, 51%, 23%) |
| OKLCH | oklch(31% 0.083 266.8) |
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 #1D2D5A | 13.33:1 | AAA | Lc -102.8 | Preferred for body text |
| Black text on #1D2D5A | 1.57:1 | Fails | Lc 0.0 | Not readable |
| #1D2D5A text on white | 13.33:1 | AAA | Lc 99.5 | Preferred for body text |
| #1D2D5A text on black | 1.57:1 | 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
#F1F5FF
oklch(97% 0.014 268.5)
-
Step 100
100
#E1EAFE
oklch(93.6% 0.029 266.4)
-
Step 200
200
#C9D9FE
oklch(88.5% 0.054 266.8)
-
Step 300
300
#A5BFFF
oklch(80.9% 0.095 267.2)
-
Step 400
400
#759BFF
oklch(70.6% 0.153 266.8)
-
Step 500
500
#537EFF
oklch(63.1% 0.197 266.8)
-
Step 600
600
#3A62F1
oklch(55.6% 0.219 266.9)
-
Step 700
700
#2D50D2
oklch(49.2% 0.204 266.8)
-
Step 800
800
#2542AA
oklch(42.6% 0.17 266.8)
-
Step 900
900
#223A86
oklch(37.8% 0.131 266.7)
-
Step 950
950 (this color)
#1D2D5A
oklch(31% 0.083 266.8)
#1D2D5A 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) | #17325C | 0.015 |
| Deuteranopia (no green cones) | #0C2D59 | 0.018 |
| Tritanopia (no blue cones) | #00373F | 0.070 |
| Achromatopsia (no color) | #2F2F2F | 0.083 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1D2D5A
#1D2D5A
oklch(31% 0.083 266.8)
- #3E2E00
#3E2E00
oklch(31.1% 0.064 87.7)
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 #1D2D5A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine #042E60 ΔE 0.023
- Prussian Blue #1D3557 ΔE 0.027
- Marine Blue #01386A ΔE 0.042
- Space Cadet #2B2D42 ΔE 0.047
- Gunmetal #293241 ΔE 0.054
- Dark Blue Grey #1F3B4D ΔE 0.056
- Oxford Blue #1B263B ΔE 0.058
- Midnight Green #073B4C ΔE 0.058
Use #1D2D5A 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.