#1E3A79
Closest named color: Twilight Blue (#0A437A). oklch(36.5% 0.113 263.7), rgb(30, 58, 121).
Aa
White text reads best on this color (10.84:1).
About this color
#1E3A79 is a dark, moderately saturated blue. In OKLCH its lightness is 36%, its chroma 0.113 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.027 away. White text reads best on it, at 10.84:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.113) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 1.93:1 |
| White text | 10.84:1 |
Values
| HEX | #1E3A79 |
| RGB | rgb(30, 58, 121) |
| HSL | hsl(222, 60%, 30%) |
| OKLCH | oklch(36.5% 0.113 263.7) |
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 #1E3A79 | 10.84:1 | AAA | Lc -98.7 | Preferred for body text |
| Black text on #1E3A79 | 1.93:1 | Fails | Lc 9.1 | Not readable |
| #1E3A79 text on white | 10.84:1 | AAA | Lc 94.8 | Preferred for body text |
| #1E3A79 text on black | 1.93:1 | Fails | Lc -7.8 | 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
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E1EAFB
oklch(93.5% 0.025 263.3)
-
Step 200
200
#C9DAF9
oklch(88.5% 0.047 262.5)
-
Step 300
300
#A5C1F8
oklch(81% 0.084 263.6)
-
Step 400
400
#749EF5
oklch(70.6% 0.136 263.7)
-
Step 500
500
#5183F1
oklch(63% 0.174 263.8)
-
Step 600
600
#376AE0
oklch(55.7% 0.189 263.8)
-
Step 700
700
#2A57C2
oklch(49.1% 0.175 263.9)
-
Step 800
800
#23489D
oklch(42.7% 0.145 263.7)
-
Step 900
900 (this color)
#1E3A79
oklch(36.5% 0.113 263.7)
-
Step 950
950
#142449
oklch(26.9% 0.072 264.5)
#1E3A79 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) | #15427B | 0.023 |
| Deuteranopia (no green cones) | #003978 | 0.021 |
| Tritanopia (no blue cones) | #004953 | 0.091 |
| Achromatopsia (no color) | #3D3D3D | 0.113 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1E3A79
#1E3A79
oklch(36.5% 0.113 263.7)
- #513A00
#513A00
oklch(36.5% 0.075 83.5)
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 #1E3A79, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.027
- Marine Blue #01386A ΔE 0.035
- Cobalt #1E488F ΔE 0.051
- Prussian Blue #1D3557 ΔE 0.059
- Marine #042E60 ΔE 0.061
- Light Navy #155084 ΔE 0.064
- Dark Slate Blue #483D8B ΔE 0.068
- Dark Grey Blue #29465B ΔE 0.071
Use #1E3A79 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.