#1D3382
Closest named color: Twilight Blue (#0A437A). oklch(35.7% 0.136 267.2), rgb(29, 51, 130).
Aa
White text reads best on this color (11.36:1).
About this color
#1D3382 is a dark, moderately saturated blue. In OKLCH its lightness is 36%, its chroma 0.136 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.047 away. White text reads best on it, at 11.36:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.136) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 1.84:1 |
| White text | 11.36:1 |
Values
| HEX | #1D3382 |
| RGB | rgb(29, 51, 130) |
| HSL | hsl(227, 64%, 31%) |
| OKLCH | oklch(35.7% 0.136 267.2) |
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 #1D3382 | 11.36:1 | AAA | Lc -99.5 | Preferred for body text |
| Black text on #1D3382 | 1.84:1 | Fails | Lc 8.2 | Not readable |
| #1D3382 text on white | 11.36:1 | AAA | Lc 95.7 | Preferred for body text |
| #1D3382 text on black | 1.84:1 | 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
#F1F5FF
oklch(97% 0.014 268.5)
-
Step 100
100
#E1EAFE
oklch(93.6% 0.029 266.4)
-
Step 200
200
#C9D9FF
oklch(88.6% 0.055 267.2)
-
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
#547EFF
oklch(63.1% 0.197 267)
-
Step 600
600
#3A60F5
oklch(55.6% 0.226 267.3)
-
Step 700
700
#2D4ED5
oklch(49.1% 0.21 267.1)
-
Step 800
800
#2541AC
oklch(42.6% 0.174 267.1)
-
Step 900
900 (this color)
#1D3382
oklch(35.7% 0.136 267.2)
-
Step 950
950
#142250
oklch(27% 0.086 267.5)
#1D3382 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) | #003F85 | 0.033 |
| Deuteranopia (no green cones) | #003680 | 0.020 |
| Tritanopia (no blue cones) | #004755 | 0.107 |
| Achromatopsia (no color) | #3A3A3A | 0.136 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1D3382
#1D3382
oklch(35.7% 0.136 267.2)
- #4D3900
#4D3900
oklch(35.7% 0.073 86.5)
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 #1D3382, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.047
- Marine Blue #01386A ΔE 0.049
- Cobalt #1E488F ΔE 0.060
- Marine #042E60 ΔE 0.066
- Royal #0C1793 ΔE 0.066
- Sapphire #2138AB ΔE 0.070
- Midnight Blue #191970 ΔE 0.071
- Dark Slate Blue #483D8B ΔE 0.072
Use #1D3382 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.