#1E3663
Closest named color: Prussian Blue (#1D3557). oklch(33.9% 0.085 261.8), rgb(30, 54, 99).
Aa
White text reads best on this color (11.91:1).
About this color
#1E3663 is a dark, moderately saturated blue. In OKLCH its lightness is 34%, its chroma 0.085 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.021 away. White text reads best on it, at 11.91:1.
| Hue family | Blues |
| Lightness | dark (34%) |
| Chroma | moderately saturated (0.085) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.76:1 |
| White text | 11.91:1 |
Values
| HEX | #1E3663 |
| RGB | rgb(30, 54, 99) |
| HSL | hsl(219, 53%, 25%) |
| OKLCH | oklch(33.9% 0.085 261.8) |
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 #1E3663 | 11.91:1 | AAA | Lc -100.7 | Preferred for body text |
| Black text on #1E3663 | 1.76:1 | Fails | Lc 0.0 | Not readable |
| #1E3663 text on white | 11.91:1 | AAA | Lc 97.1 | Preferred for body text |
| #1E3663 text on black | 1.76:1 | 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
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E3EAF7
oklch(93.6% 0.019 263)
-
Step 200
200
#CDDAF1
oklch(88.6% 0.035 262)
-
Step 300
300
#AAC1EB
oklch(80.8% 0.065 262.4)
-
Step 400
400
#7DA1E0
oklch(70.7% 0.101 261.2)
-
Step 500
500
#5D88D8
oklch(63.2% 0.13 261.9)
-
Step 600
600
#4370C5
oklch(55.6% 0.141 261.9)
-
Step 700
700
#355DAA
oklch(49% 0.131 262.1)
-
Step 800
800
#2C4D8A
oklch(42.8% 0.109 261.6)
-
Step 900
900 (this color)
#1E3663
oklch(33.9% 0.085 261.8)
-
Step 950
950
#172641
oklch(27% 0.055 261.4)
#1E3663 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) | #213A65 | 0.013 |
| Deuteranopia (no green cones) | #163462 | 0.011 |
| Tritanopia (no blue cones) | #004047 | 0.070 |
| Achromatopsia (no color) | #373737 | 0.085 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1E3663
#1E3663
oklch(33.9% 0.085 261.8)
- #4A3300
#4A3300
oklch(33.9% 0.07 80.9)
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 #1E3663, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.021
- Marine Blue #01386A ΔE 0.023
- Marine #042E60 ΔE 0.036
- Dark Blue Grey #1F3B4D ΔE 0.046
- Twilight Blue #0A437A ΔE 0.051
- Midnight Green #073B4C ΔE 0.052
- Dark Grey Blue #29465B ΔE 0.059
- Gunmetal #293241 ΔE 0.060
Use #1E3663 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.