#1D2956
Closest named color: Marine (#042E60). oklch(29.7% 0.083 269.6), rgb(29, 41, 86).
Aa
White text reads best on this color (13.96:1).
About this color
#1D2956 is a dark, moderately saturated blue. In OKLCH its lightness is 30%, its chroma 0.083 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Marine (#042E60), ΔE 0.029 away. White text reads best on it, at 13.96:1.
| Hue family | Blues |
| Lightness | dark (30%) |
| Chroma | moderately saturated (0.083) |
| Temperature | cool |
| Nearest name | Marine (#042E60) |
| Black text | 1.50:1 |
| White text | 13.96:1 |
Values
| HEX | #1D2956 |
| RGB | rgb(29, 41, 86) |
| HSL | hsl(227, 50%, 23%) |
| OKLCH | oklch(29.7% 0.083 269.6) |
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 #1D2956 | 13.96:1 | AAA | Lc -103.5 | Preferred for body text |
| Black text on #1D2956 | 1.50:1 | Fails | Lc 0.0 | Not readable |
| #1D2956 text on white | 13.96:1 | AAA | Lc 100.4 | Preferred for body text |
| #1D2956 text on black | 1.50:1 | 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
#E2EAFE
oklch(93.7% 0.028 268.4)
-
Step 200
200
#CBD8FE
oklch(88.5% 0.054 270.4)
-
Step 300
300
#A8BEFF
oklch(80.9% 0.096 269.8)
-
Step 400
400
#7B9AFF
oklch(70.8% 0.152 269.4)
-
Step 500
500
#5C7CFF
oklch(63.1% 0.197 269.6)
-
Step 600
600
#4460F0
oklch(55.6% 0.218 269.5)
-
Step 700
700
#374ED1
oklch(49.1% 0.202 269.5)
-
Step 800
800
#2D41A9
oklch(42.7% 0.168 269.5)
-
Step 900
900
#273986
oklch(37.8% 0.131 269.3)
-
Step 950
950 (this color)
#1D2956
oklch(29.7% 0.083 269.6)
#1D2956 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) | #122F58 | 0.020 |
| Deuteranopia (no green cones) | #082A55 | 0.021 |
| Tritanopia (no blue cones) | #00333B | 0.071 |
| Achromatopsia (no color) | #2C2C2C | 0.083 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1D2956
#1D2956
oklch(29.7% 0.083 269.6)
- #392B00
#392B00
oklch(29.7% 0.061 89.4)
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 #1D2956, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine #042E60 ΔE 0.029
- Prussian Blue #1D3557 ΔE 0.038
- Space Cadet #2B2D42 ΔE 0.046
- Oxford Blue #1B263B ΔE 0.050
- Marine Blue #01386A ΔE 0.054
- Gunmetal #293241 ΔE 0.057
- Midnight Blue #191970 ΔE 0.062
- Dark Blue Grey #1F3B4D ΔE 0.064
Use #1D2956 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.