#2C51C1
Closest named color: Blue Blue (#2242C7). oklch(47.8% 0.181 265.8), rgb(44, 81, 193).
Aa
White text reads best on this color (6.87:1).
About this color
#2C51C1 is a medium-dark, vivid blue. In OKLCH its lightness is 48%, its chroma 0.181 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Blue (#2242C7), ΔE 0.038 away. White text reads best on it, at 6.87:1.
| Hue family | Blues |
| Lightness | medium-dark (48%) |
| Chroma | vivid (0.181) |
| Temperature | cool |
| Nearest name | Blue Blue (#2242C7) |
| Black text | 3.05:1 |
| White text | 6.87:1 |
Values
| HEX | #2C51C1 |
| RGB | rgb(44, 81, 193) |
| HSL | hsl(225, 63%, 46%) |
| OKLCH | oklch(47.8% 0.181 265.8) |
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 #2C51C1 | 6.87:1 | AA | Lc -88.2 | Fine for body text |
| Black text on #2C51C1 | 3.05:1 | AA large text | Lc 20.8 | Dividers and decoration only |
| #2C51C1 text on white | 6.87:1 | AA | Lc 83.2 | Fine for body text |
| #2C51C1 text on black | 3.05:1 | AA large text | Lc -18.7 | 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 700.
-
Step 50
50
#F2F5FE
oklch(97% 0.012 271.3)
-
Step 100
100
#E2EAFB
oklch(93.6% 0.025 265.6)
-
Step 200
200
#CAD9FA
oklch(88.5% 0.048 266)
-
Step 300
300
#A6C0FA
oklch(80.9% 0.087 265.8)
-
Step 400
400
#779DF8
oklch(70.8% 0.14 265.8)
-
Step 500
500
#5581F4
oklch(63% 0.179 265.8)
-
Step 600
600
#3C67E3
oklch(55.5% 0.195 265.8)
-
Step 700
700 (this color)
#2C51C1
oklch(47.8% 0.181 265.8)
-
Step 800
800
#27469F
oklch(42.6% 0.149 265.8)
-
Step 900
900
#243C7F
oklch(37.7% 0.117 266.1)
-
Step 950
950
#15244A
oklch(27% 0.073 265.6)
#2C51C1 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) | #0061C5 | 0.041 |
| Deuteranopia (no green cones) | #0054BF | 0.023 |
| Tritanopia (no blue cones) | #006D81 | 0.141 |
| Achromatopsia (no color) | #5A5A5A | 0.181 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2C51C1
#2C51C1
oklch(47.8% 0.181 265.8)
- #765800
#765800
oklch(47.9% 0.098 85.5)
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 #2C51C1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Blue #2242C7 ΔE 0.038
- Majorelle Blue #3F37C9 ΔE 0.056
- Warm Blue #4B57DB ΔE 0.058
- Blue With A Hint Of Purple #533CC6 ΔE 0.062
- Blurple #5539CC ΔE 0.068
- Mid Blue #276AB3 ΔE 0.071
- Azul #1D5DEC ΔE 0.072
- Sapphire #2138AB ΔE 0.072
Use #2C51C1 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.