#2E4578
Closest named color: Twilight Blue (#0A437A). oklch(39.8% 0.091 264.4), rgb(46, 69, 120).
Aa
White text reads best on this color (9.38:1).
About this color
#2E4578 is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.091 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.032 away. White text reads best on it, at 9.38:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.091) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.23:1 |
| White text | 9.38:1 |
Values
| HEX | #2E4578 |
| RGB | rgb(46, 69, 120) |
| HSL | hsl(221, 45%, 33%) |
| OKLCH | oklch(39.8% 0.091 264.4) |
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 #2E4578 | 9.38:1 | AAA | Lc -95.8 | Preferred for body text |
| Black text on #2E4578 | 2.23:1 | Fails | Lc 12.5 | Not readable |
| #2E4578 text on white | 9.38:1 | AAA | Lc 91.5 | Preferred for body text |
| #2E4578 text on black | 2.23:1 | Fails | Lc -10.9 | 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
#F2F5FC
oklch(97% 0.01 267.4)
-
Step 100
100
#E3EAF8
oklch(93.6% 0.02 264.5)
-
Step 200
200
#CDD9F3
oklch(88.4% 0.038 265.8)
-
Step 300
300
#ABC1EE
oklch(81% 0.068 264.5)
-
Step 400
400
#7E9FE5
oklch(70.6% 0.11 264.5)
-
Step 500
500
#5E86DD
oklch(63.1% 0.139 264.2)
-
Step 600
600
#456ECB
oklch(55.6% 0.151 264.2)
-
Step 700
700
#375BB0
oklch(49.1% 0.142 264.5)
-
Step 800
800
#2E4B8E
oklch(42.7% 0.116 264.4)
-
Step 900
900 (this color)
#2E4578
oklch(39.8% 0.091 264.4)
-
Step 950
950
#182542
oklch(26.9% 0.057 264.6)
#2E4578 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) | #2F4A7A | 0.015 |
| Deuteranopia (no green cones) | #254377 | 0.013 |
| Tritanopia (no blue cones) | #005058 | 0.080 |
| Achromatopsia (no color) | #464646 | 0.091 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2E4578
#2E4578
oklch(39.8% 0.091 264.4)
- #5C4300
#5C4300
oklch(39.9% 0.082 84.4)
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 #2E4578, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.032
- Light Navy #155084 ΔE 0.037
- Cobalt #1E488F ΔE 0.040
- Deep Sea Blue #015482 ΔE 0.048
- Dusk Blue #26538D ΔE 0.048
- Dark Grey Blue #29465B ΔE 0.052
- Dark Slate Blue #483D8B ΔE 0.055
- Blueberry #464196 ΔE 0.063
Use #2E4578 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.