#2B51CC
Closest named color: Blue Blue (#2242C7). oklch(48.7% 0.195 266), rgb(43, 81, 204).
Aa
White text reads best on this color (6.66:1).
About this color
#2B51CC is a medium-dark, vivid blue. In OKLCH its lightness is 49%, its chroma 0.195 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 6.66:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.195) |
| Temperature | cool |
| Nearest name | Blue Blue (#2242C7) |
| Black text | 3.15:1 |
| White text | 6.66:1 |
Values
| HEX | #2B51CC |
| RGB | rgb(43, 81, 204) |
| HSL | hsl(226, 65%, 48%) |
| OKLCH | oklch(48.7% 0.195 266) |
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 #2B51CC | 6.66:1 | AA | Lc -87.3 | Fine for body text |
| Black text on #2B51CC | 3.15:1 | AA large text | Lc 21.8 | Dividers and decoration only |
| #2B51CC text on white | 6.66:1 | AA | Lc 82.3 | Fine for body text |
| #2B51CC text on black | 3.15:1 | AA large text | Lc -19.6 | 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 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
#C9D9FD
oklch(88.5% 0.053 266.4)
-
Step 300
300
#A4C0FF
oklch(81% 0.095 265.8)
-
Step 400
400
#749CFE
oklch(70.7% 0.15 265.9)
-
Step 500
500
#527FFD
oklch(63.1% 0.194 266.2)
-
Step 600
600
#3964EC
oklch(55.5% 0.211 266.2)
-
Step 700
700 (this color)
#2B51CC
oklch(48.7% 0.195 266)
-
Step 800
800
#2544A6
oklch(42.7% 0.162 266.1)
-
Step 900
900
#223B83
oklch(37.7% 0.125 266.1)
-
Step 950
950
#14234D
oklch(27% 0.08 266.3)
#2B51CC 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) | #0064D0 | 0.046 |
| Deuteranopia (no green cones) | #0055CA | 0.021 |
| Tritanopia (no blue cones) | #007187 | 0.152 |
| Achromatopsia (no color) | #5C5C5C | 0.196 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2B51CC
#2B51CC
oklch(48.7% 0.195 266)
- #795B00
#795B00
oklch(48.9% 0.1 86.2)
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 #2B51CC, 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 0.047
- Majorelle Blue #3F37C9 ΔE 0.054
- Azul #1D5DEC ΔE 0.056
- Blue With A Hint Of Purple #533CC6 ΔE 0.061
- Blurple #5539CC ΔE 0.066
- Neon Blue #4361EE ΔE 0.072
- Royal Blue #4169E1 ΔE 0.073
Use #2B51CC 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.