#2E51A1
Closest named color: Dusk Blue (#26538D). oklch(45.4% 0.136 264), rgb(46, 81, 161).
Aa
White text reads best on this color (7.47:1).
About this color
#2E51A1 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 45%, its chroma 0.136 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.035 away. White text reads best on it, at 7.47:1.
| Hue family | Blues |
| Lightness | medium-dark (45%) |
| Chroma | moderately saturated (0.136) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.80:1 |
| White text | 7.47:1 |
Values
| HEX | #2E51A1 |
| RGB | rgb(46, 81, 161) |
| HSL | hsl(222, 56%, 41%) |
| OKLCH | oklch(45.4% 0.136 264) |
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 #2E51A1 | 7.47:1 | AAA | Lc -90.5 | Preferred for body text |
| Black text on #2E51A1 | 2.80:1 | Fails | Lc 18.4 | Dividers and decoration only |
| #2E51A1 text on white | 7.47:1 | AAA | Lc 85.6 | Fine for body text |
| #2E51A1 text on black | 2.80:1 | Fails | Lc -16.4 | Dividers and decoration only |
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 800.
-
Step 50
50
#F2F6FD
oklch(97.2% 0.01 261.8)
-
Step 100
100
#E2EAFA
oklch(93.6% 0.023 264.5)
-
Step 200
200
#CADAF7
oklch(88.5% 0.044 262.4)
-
Step 300
300
#A7C1F5
oklch(81% 0.079 264)
-
Step 400
400
#789FF0
oklch(70.8% 0.127 263.9)
-
Step 500
500
#5684EB
oklch(63.1% 0.163 264.2)
-
Step 600
600
#3C6BD9
oklch(55.6% 0.177 264.1)
-
Step 700
700
#2E59BC
oklch(49.1% 0.164 263.8)
-
Step 800
800 (this color)
#2E51A1
oklch(45.4% 0.136 264)
-
Step 900
900
#243E79
oklch(37.7% 0.106 264.1)
-
Step 950
950
#152547
oklch(27.1% 0.067 263.6)
#2E51A1 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) | #245AA4 | 0.024 |
| Deuteranopia (no green cones) | #00509F | 0.028 |
| Tritanopia (no blue cones) | #006471 | 0.110 |
| Achromatopsia (no color) | #555555 | 0.136 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2E51A1
#2E51A1
oklch(45.4% 0.136 264)
- #6F5100
#6F5100
oklch(45.5% 0.093 83.8)
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 #2E51A1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.035
- Cobalt #1E488F ΔE 0.042
- Denim Blue #3B5B92 ΔE 0.044
- Blueberry #464196 ΔE 0.049
- Light Navy Blue #2E5A88 ΔE 0.052
- Twilight #4E518B ΔE 0.053
- Light Navy #155084 ΔE 0.053
- Dusky Blue #475F94 ΔE 0.059
Use #2E51A1 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.