#2D51A5
Closest named color: Dusk Blue (#26538D). oklch(45.7% 0.142 264.1), rgb(45, 81, 165).
Aa
White text reads best on this color (7.41:1).
About this color
#2D51A5 is a medium-dark, vivid blue. In OKLCH its lightness is 46%, its chroma 0.142 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.041 away. White text reads best on it, at 7.41:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | vivid (0.142) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.83:1 |
| White text | 7.41:1 |
Values
| HEX | #2D51A5 |
| RGB | rgb(45, 81, 165) |
| HSL | hsl(222, 57%, 41%) |
| OKLCH | oklch(45.7% 0.142 264.1) |
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 #2D51A5 | 7.41:1 | AAA | Lc -90.3 | Preferred for body text |
| Black text on #2D51A5 | 2.83:1 | Fails | Lc 18.6 | Dividers and decoration only |
| #2D51A5 text on white | 7.41:1 | AAA | Lc 85.4 | Fine for body text |
| #2D51A5 text on black | 2.83:1 | Fails | Lc -16.6 | 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
#CADAF9
oklch(88.6% 0.046 263.7)
-
Step 300
300
#A6C1F7
oklch(81% 0.082 264)
-
Step 400
400
#769EF3
oklch(70.6% 0.133 264.2)
-
Step 500
500
#5483EF
oklch(63.1% 0.17 264.4)
-
Step 600
600
#3A6ADD
oklch(55.6% 0.184 264.2)
-
Step 700
700
#2C58C0
oklch(49.2% 0.171 263.9)
-
Step 800
800 (this color)
#2D51A5
oklch(45.7% 0.142 264.1)
-
Step 900
900
#223D7C
oklch(37.6% 0.112 264.3)
-
Step 950
950
#142448
oklch(26.8% 0.07 264.2)
#2D51A5 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) | #1F5BA8 | 0.027 |
| Deuteranopia (no green cones) | #0050A3 | 0.027 |
| Tritanopia (no blue cones) | #006573 | 0.114 |
| Achromatopsia (no color) | #555555 | 0.142 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2D51A5
#2D51A5
oklch(45.7% 0.142 264.1)
- #6F5200
#6F5200
oklch(45.7% 0.094 84.9)
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 #2D51A5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.041
- Cobalt #1E488F ΔE 0.046
- Denim Blue #3B5B92 ΔE 0.048
- Blueberry #464196 ΔE 0.051
- Twilight #4E518B ΔE 0.058
- Light Navy Blue #2E5A88 ΔE 0.058
- Light Navy #155084 ΔE 0.059
- Dusky Blue #475F94 ΔE 0.062
Use #2D51A5 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.