#1D3752
Closest named color: Prussian Blue (#1D3557). oklch(33% 0.058 250.8), rgb(29, 55, 82).
Aa
White text reads best on this color (12.20:1).
About this color
#1D3752 is a dark, muted blue. In OKLCH its lightness is 33%, its chroma 0.058 and its hue 251°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.012 away. White text reads best on it, at 12.20:1.
| Hue family | Blues |
| Lightness | dark (33%) |
| Chroma | muted (0.058) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.72:1 |
| White text | 12.20:1 |
Values
| HEX | #1D3752 |
| RGB | rgb(29, 55, 82) |
| HSL | hsl(211, 48%, 22%) |
| OKLCH | oklch(33% 0.058 250.8) |
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 #1D3752 | 12.20:1 | AAA | Lc -101.2 | Preferred for body text |
| Black text on #1D3752 | 1.72:1 | Fails | Lc 0.0 | Not readable |
| #1D3752 text on white | 12.20:1 | AAA | Lc 97.7 | Preferred for body text |
| #1D3752 text on black | 1.72:1 | 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 900.
-
Step 50
50
#F3F6F9
oklch(97.2% 0.005 247.9)
-
Step 100
100
#E4EBF2
oklch(93.7% 0.012 248)
-
Step 200
200
#CEDBE9
oklch(88.6% 0.024 250.1)
-
Step 300
300
#ACC3DC
oklch(80.8% 0.043 250.6)
-
Step 400
400
#80A4CB
oklch(70.6% 0.07 250.8)
-
Step 500
500
#608DBE
oklch(63.1% 0.089 251.4)
-
Step 600
600
#4577AA
oklch(55.7% 0.097 250.4)
-
Step 700
700
#376492
oklch(49.2% 0.089 250.6)
-
Step 800
800
#2E5176
oklch(42.6% 0.074 251.2)
-
Step 900
900 (this color)
#1D3752
oklch(33% 0.058 250.8)
-
Step 950
950
#182838
oklch(27.1% 0.037 249.3)
#1D3752 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) | #2C3853 | 0.020 |
| Deuteranopia (no green cones) | #253351 | 0.015 |
| Tritanopia (no blue cones) | #003D41 | 0.047 |
| Achromatopsia (no color) | #353535 | 0.058 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1D3752
#1D3752
oklch(33% 0.058 250.8)
- #48300F
#48300F
oklch(33.1% 0.058 71.6)
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 #1D3752, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.012
- Dark Blue Grey #1F3B4D ΔE 0.018
- Midnight Green #073B4C ΔE 0.025
- Gunmetal #293241 ΔE 0.032
- Space Cadet #2B2D42 ΔE 0.040
- Marine Blue #01386A ΔE 0.045
- Onyx #343A40 ΔE 0.047
- Marine #042E60 ΔE 0.048
Use #1D3752 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.