#2D51C5
Closest named color: Blue Blue (#2242C7). oklch(48.2% 0.186 266.2), rgb(45, 81, 197).
Aa
White text reads best on this color (6.78:1).
About this color
#2D51C5 is a medium-dark, vivid blue. In OKLCH its lightness is 48%, its chroma 0.186 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 6.78:1.
| Hue family | Blues |
| Lightness | medium-dark (48%) |
| Chroma | vivid (0.186) |
| Temperature | cool |
| Nearest name | Blue Blue (#2242C7) |
| Black text | 3.09:1 |
| White text | 6.78:1 |
Values
| HEX | #2D51C5 |
| RGB | rgb(45, 81, 197) |
| HSL | hsl(226, 63%, 47%) |
| OKLCH | oklch(48.2% 0.186 266.2) |
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 #2D51C5 | 6.78:1 | AA | Lc -87.9 | Fine for body text |
| Black text on #2D51C5 | 3.09:1 | AA large text | Lc 21.2 | Dividers and decoration only |
| #2D51C5 text on white | 6.78:1 | AA | Lc 82.8 | Fine for body text |
| #2D51C5 text on black | 3.09:1 | AA large text | Lc -19.1 | 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
#E2EAFC
oklch(93.6% 0.026 266.6)
-
Step 200
200
#CAD9FB
oklch(88.5% 0.05 266.5)
-
Step 300
300
#A6C0FC
oklch(81% 0.09 266.3)
-
Step 400
400
#779CFA
oklch(70.7% 0.144 266.5)
-
Step 500
500
#5580F7
oklch(63% 0.184 266.3)
-
Step 600
600
#3C66E6
oklch(55.6% 0.2 266.2)
-
Step 700
700 (this color)
#2D51C5
oklch(48.2% 0.186 266.2)
-
Step 800
800
#2745A2
oklch(42.6% 0.155 266.3)
-
Step 900
900
#243C80
oklch(37.8% 0.119 266.2)
-
Step 950
950
#15244B
oklch(27.1% 0.075 265.8)
#2D51C5 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) | #0062C9 | 0.043 |
| Deuteranopia (no green cones) | #0054C3 | 0.023 |
| Tritanopia (no blue cones) | #006E83 | 0.145 |
| Achromatopsia (no color) | #5B5B5B | 0.186 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2D51C5
#2D51C5
oklch(48.2% 0.186 266.2)
- #775900
#775900
oklch(48.2% 0.099 85.7)
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 #2D51C5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Blue #2242C7 ΔE 0.038
- Warm Blue #4B57DB ΔE 0.052
- Majorelle Blue #3F37C9 ΔE 0.054
- Blue With A Hint Of Purple #533CC6 ΔE 0.060
- Azul #1D5DEC ΔE 0.066
- Blurple #5539CC ΔE 0.066
- Iris #6258C4 ΔE 0.073
- Mid Blue #276AB3 ΔE 0.074
Use #2D51C5 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.