#2E51B1
Closest named color: Blue Blue (#2242C7). oklch(46.6% 0.158 265.5), rgb(46, 81, 177).
Aa
White text reads best on this color (7.17:1).
About this color
#2E51B1 is a medium-dark, vivid blue. In OKLCH its lightness is 47%, its chroma 0.158 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Blue (#2242C7), ΔE 0.052 away. White text reads best on it, at 7.17:1.
| Hue family | Blues |
| Lightness | medium-dark (47%) |
| Chroma | vivid (0.158) |
| Temperature | cool |
| Nearest name | Blue Blue (#2242C7) |
| Black text | 2.92:1 |
| White text | 7.17:1 |
Values
| HEX | #2E51B1 |
| RGB | rgb(46, 81, 177) |
| HSL | hsl(224, 59%, 44%) |
| OKLCH | oklch(46.6% 0.158 265.5) |
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 #2E51B1 | 7.17:1 | AAA | Lc -89.4 | Fine for body text |
| Black text on #2E51B1 | 2.92:1 | Fails | Lc 19.6 | Dividers and decoration only |
| #2E51B1 text on white | 7.17:1 | AAA | Lc 84.4 | Fine for body text |
| #2E51B1 text on black | 2.92:1 | Fails | Lc -17.5 | 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 700.
-
Step 50
50
#F2F5FD
oklch(97% 0.011 269.6)
-
Step 100
100
#E3EAF9
oklch(93.6% 0.022 265.8)
-
Step 200
200
#CCD9F6
oklch(88.5% 0.042 266.3)
-
Step 300
300
#A9C0F3
oklch(80.8% 0.077 265.8)
-
Step 400
400
#7C9EED
oklch(70.7% 0.122 265.7)
-
Step 500
500
#5B84E7
oklch(63.1% 0.156 265.3)
-
Step 600
600
#426BD6
oklch(55.6% 0.171 265.4)
-
Step 700
700 (this color)
#2E51B1
oklch(46.6% 0.158 265.5)
-
Step 800
800
#2C4996
oklch(42.8% 0.131 265.6)
-
Step 900
900
#273E77
oklch(37.7% 0.101 265.3)
-
Step 950
950
#172546
oklch(27.1% 0.064 265.1)
#2E51B1 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) | #025EB4 | 0.037 |
| Deuteranopia (no green cones) | #0052AF | 0.026 |
| Tritanopia (no blue cones) | #006879 | 0.125 |
| Achromatopsia (no color) | #575757 | 0.159 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2E51B1
#2E51B1
oklch(46.6% 0.158 265.5)
- #725500
#725500
oklch(46.7% 0.096 85.6)
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 #2E51B1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Blue #2242C7 ΔE 0.052
- Dusk Blue #26538D ΔE 0.060
- Blueberry #464196 ΔE 0.061
- Cobalt #1E488F ΔE 0.062
- Denim Blue #3B5B92 ΔE 0.063
- Sapphire #2138AB ΔE 0.065
- Mid Blue #276AB3 ΔE 0.067
- Majorelle Blue #3F37C9 ΔE 0.068
Use #2E51B1 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.