#2E3A73
Closest named color: Twilight Blue (#0A437A). oklch(37% 0.098 271.9), rgb(46, 58, 115).
Aa
White text reads best on this color (10.66:1).
About this color
#2E3A73 is a dark, moderately saturated blue. In OKLCH its lightness is 37%, its chroma 0.098 and its hue 272°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.037 away. White text reads best on it, at 10.66:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.098) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 1.96:1 |
| White text | 10.66:1 |
Values
| HEX | #2E3A73 |
| RGB | rgb(46, 58, 115) |
| HSL | hsl(230, 43%, 32%) |
| OKLCH | oklch(37% 0.098 271.9) |
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 #2E3A73 | 10.66:1 | AAA | Lc -98.5 | Preferred for body text |
| Black text on #2E3A73 | 1.96:1 | Fails | Lc 9.4 | Not readable |
| #2E3A73 text on white | 10.66:1 | AAA | Lc 94.5 | Preferred for body text |
| #2E3A73 text on black | 1.96:1 | Fails | Lc -8.1 | 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
#F3F5FC
oklch(97.1% 0.01 273.4)
-
Step 100
100
#E5E9F9
oklch(93.6% 0.022 274.7)
-
Step 200
200
#CFD8F5
oklch(88.4% 0.041 271.9)
-
Step 300
300
#AFBEF1
oklch(80.8% 0.074 271.9)
-
Step 400
400
#879BEA
oklch(70.6% 0.118 272.3)
-
Step 500
500
#6A81E4
oklch(63.2% 0.151 271.6)
-
Step 600
600
#5368D2
oklch(55.7% 0.164 271.7)
-
Step 700
700
#4456B6
oklch(49.2% 0.152 271.7)
-
Step 800
800
#384793
oklch(42.8% 0.126 271.7)
-
Step 900
900 (this color)
#2E3A73
oklch(37% 0.098 271.9)
-
Step 950
950
#1C2445
oklch(27.1% 0.062 271.5)
#2E3A73 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) | #1F4175 | 0.024 |
| Deuteranopia (no green cones) | #153B72 | 0.027 |
| Tritanopia (no blue cones) | #014751 | 0.088 |
| Achromatopsia (no color) | #3E3E3E | 0.099 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2E3A73
#2E3A73
oklch(37% 0.098 271.9)
- #4E3E00
#4E3E00
oklch(37% 0.076 92.3)
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 #2E3A73, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.037
- Marine Blue #01386A ΔE 0.046
- Prussian Blue #1D3557 ΔE 0.056
- Cobalt #1E488F ΔE 0.057
- Dark Slate Blue #483D8B ΔE 0.059
- Dark Grey Blue #29465B ΔE 0.062
- Light Navy #155084 ΔE 0.066
- Marine #042E60 ΔE 0.068
Use #2E3A73 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.