#2E3A81
Closest named color: Twilight Blue (#0A437A). oklch(38% 0.12 272.2), rgb(46, 58, 129).
Aa
White text reads best on this color (10.30:1).
About this color
#2E3A81 is a dark, moderately saturated blue. In OKLCH its lightness is 38%, its chroma 0.120 and its hue 272°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.040 away. White text reads best on it, at 10.30:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.120) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.03:1 |
| White text | 10.30:1 |
Values
| HEX | #2E3A81 |
| RGB | rgb(46, 58, 129) |
| HSL | hsl(231, 47%, 34%) |
| OKLCH | oklch(38% 0.12 272.2) |
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 #2E3A81 | 10.30:1 | AAA | Lc -97.7 | Preferred for body text |
| Black text on #2E3A81 | 2.03:1 | Fails | Lc 10.3 | Not readable |
| #2E3A81 text on white | 10.30:1 | AAA | Lc 93.6 | Preferred for body text |
| #2E3A81 text on black | 2.03:1 | Fails | Lc -8.9 | 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
#F2F5FE
oklch(97% 0.012 271.3)
-
Step 100
100
#E4E9FC
oklch(93.6% 0.026 274.1)
-
Step 200
200
#CDD8FB
oklch(88.5% 0.05 271.6)
-
Step 300
300
#ACBDFB
oklch(80.8% 0.09 272.4)
-
Step 400
400
#8299FA
oklch(70.7% 0.144 272.2)
-
Step 500
500
#657CF7
oklch(63.1% 0.184 272.1)
-
Step 600
600
#4F61E6
oklch(55.6% 0.201 272.3)
-
Step 700
700
#414FC8
oklch(49.1% 0.187 272.4)
-
Step 800
800
#3542A1
oklch(42.7% 0.153 272.3)
-
Step 900
900 (this color)
#2E3A81
oklch(38% 0.12 272.2)
-
Step 950
950
#1A224B
oklch(27% 0.076 272.1)
#2E3A81 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) | #0C4483 | 0.037 |
| Deuteranopia (no green cones) | #003D80 | 0.037 |
| Tritanopia (no blue cones) | #004B57 | 0.103 |
| Achromatopsia (no color) | #404040 | 0.120 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2E3A81
#2E3A81
oklch(38% 0.12 272.2)
- #514100
#514100
oklch(38.1% 0.078 93)
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 #2E3A81, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.040
- Cobalt #1E488F ΔE 0.043
- Dark Slate Blue #483D8B ΔE 0.045
- Blueberry #464196 ΔE 0.055
- Marine Blue #01386A ΔE 0.059
- Light Navy #155084 ΔE 0.063
- Dusk Blue #26538D ΔE 0.070
- Sapphire #2138AB ΔE 0.071
Use #2E3A81 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.