#2A51CA
Closest named color: Blue Blue (#2242C7). oklch(48.5% 0.193 265.7), rgb(42, 81, 202).
Aa
White text reads best on this color (6.71:1).
About this color
#2A51CA is a medium-dark, vivid blue. In OKLCH its lightness is 49%, its chroma 0.193 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Blue (#2242C7), ΔE 0.037 away. White text reads best on it, at 6.71:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.193) |
| Temperature | cool |
| Nearest name | Blue Blue (#2242C7) |
| Black text | 3.12:1 |
| White text | 6.71:1 |
Values
| HEX | #2A51CA |
| RGB | rgb(42, 81, 202) |
| HSL | hsl(225, 66%, 48%) |
| OKLCH | oklch(48.5% 0.193 265.7) |
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 #2A51CA | 6.71:1 | AA | Lc -87.5 | Fine for body text |
| Black text on #2A51CA | 3.12:1 | AA large text | Lc 21.6 | Dividers and decoration only |
| #2A51CA text on white | 6.71:1 | AA | Lc 82.5 | Fine for body text |
| #2A51CA text on black | 3.12:1 | AA large text | Lc -19.4 | 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 700.
-
Step 50
50
#F1F5FE
oklch(97% 0.013 266.7)
-
Step 100
100
#E1EAFD
oklch(93.6% 0.028 265.4)
-
Step 200
200
#C9D9FC
oklch(88.5% 0.051 265.9)
-
Step 300
300
#A4C0FE
oklch(81% 0.093 265.6)
-
Step 400
400
#749CFD
oklch(70.6% 0.149 265.8)
-
Step 500
500
#5180FB
oklch(63.1% 0.19 265.5)
-
Step 600
600
#3865EA
oklch(55.5% 0.207 265.7)
-
Step 700
700 (this color)
#2A51CA
oklch(48.5% 0.193 265.7)
-
Step 800
800
#2445A5
oklch(42.8% 0.16 265.5)
-
Step 900
900
#213B83
oklch(37.7% 0.125 265.7)
-
Step 950
950
#14234C
oklch(26.9% 0.078 266.1)
#2A51CA 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) | #0063CE | 0.044 |
| Deuteranopia (no green cones) | #0055C8 | 0.021 |
| Tritanopia (no blue cones) | #007086 | 0.150 |
| Achromatopsia (no color) | #5C5C5C | 0.193 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2A51CA
#2A51CA
oklch(48.5% 0.193 265.7)
- #785A00
#785A00
oklch(48.5% 0.099 86)
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 #2A51CA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Blue #2242C7 ΔE 0.037
- Warm Blue #4B57DB ΔE 0.049
- Majorelle Blue #3F37C9 ΔE 0.054
- Azul #1D5DEC ΔE 0.059
- Blue With A Hint Of Purple #533CC6 ΔE 0.062
- Blurple #5539CC ΔE 0.066
- Neon Blue #4361EE ΔE 0.075
- Royal Blue #4169E1 ΔE 0.075
Use #2A51CA 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.