#2E51A6
Closest named color: Dusk Blue (#26538D). oklch(45.8% 0.143 264.6), rgb(46, 81, 166).
Aa
White text reads best on this color (7.38:1).
About this color
#2E51A6 is a medium-dark, vivid blue. In OKLCH its lightness is 46%, its chroma 0.143 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.043 away. White text reads best on it, at 7.38:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | vivid (0.143) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.84:1 |
| White text | 7.38:1 |
Values
| HEX | #2E51A6 |
| RGB | rgb(46, 81, 166) |
| HSL | hsl(223, 57%, 42%) |
| OKLCH | oklch(45.8% 0.143 264.6) |
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 #2E51A6 | 7.38:1 | AAA | Lc -90.2 | Preferred for body text |
| Black text on #2E51A6 | 2.84:1 | Fails | Lc 18.7 | Dividers and decoration only |
| #2E51A6 text on white | 7.38:1 | AAA | Lc 85.3 | Fine for body text |
| #2E51A6 text on black | 2.84:1 | Fails | Lc -16.7 | 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
#E2EAFB
oklch(93.6% 0.025 265.6)
-
Step 200
200
#CAD9F9
oklch(88.4% 0.047 265.5)
-
Step 300
300
#A6C0F8
oklch(80.8% 0.085 265.2)
-
Step 400
400
#779EF4
oklch(70.7% 0.134 264.7)
-
Step 500
500
#5483F0
oklch(63.1% 0.171 264.5)
-
Step 600
600
#3B69DE
oklch(55.5% 0.186 264.8)
-
Step 700
700
#2D57C1
oklch(49.1% 0.173 264.5)
-
Step 800
800 (this color)
#2E51A6
oklch(45.8% 0.143 264.6)
-
Step 900
900
#233D7C
oklch(37.7% 0.112 264.7)
-
Step 950
950
#152449
oklch(27% 0.072 265.3)
#2E51A6 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) | #1E5BA9 | 0.027 |
| Deuteranopia (no green cones) | #0050A4 | 0.028 |
| Tritanopia (no blue cones) | #006573 | 0.115 |
| Achromatopsia (no color) | #565656 | 0.143 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2E51A6
#2E51A6
oklch(45.8% 0.143 264.6)
- #705200
#705200
oklch(45.8% 0.094 84.1)
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 #2E51A6, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.043
- Cobalt #1E488F ΔE 0.048
- Denim Blue #3B5B92 ΔE 0.049
- Blueberry #464196 ΔE 0.051
- Twilight #4E518B ΔE 0.058
- Light Navy Blue #2E5A88 ΔE 0.059
- Light Navy #155084 ΔE 0.061
- Dusky Blue #475F94 ΔE 0.062
Use #2E51A6 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.