#3B51CA
Closest named color: Warm Blue (#4B57DB). oklch(49.3% 0.188 270.1), rgb(59, 81, 202).
Aa
White text reads best on this color (6.53:1).
About this color
#3B51CA is a medium-dark, vivid blue. In OKLCH its lightness is 49%, its chroma 0.188 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Warm Blue (#4B57DB), ΔE 0.037 away. White text reads best on it, at 6.53:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.188) |
| Temperature | cool |
| Nearest name | Warm Blue (#4B57DB) |
| Black text | 3.21:1 |
| White text | 6.53:1 |
Values
| HEX | #3B51CA |
| RGB | rgb(59, 81, 202) |
| HSL | hsl(231, 57%, 51%) |
| OKLCH | oklch(49.3% 0.188 270.1) |
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 #3B51CA | 6.53:1 | AA | Lc -86.9 | Fine for body text |
| Black text on #3B51CA | 3.21:1 | AA large text | Lc 22.2 | Dividers and decoration only |
| #3B51CA text on white | 6.53:1 | AA | Lc 81.8 | Fine for body text |
| #3B51CA text on black | 3.21:1 | AA large text | Lc -20.1 | 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
#E3E9FC
oklch(93.5% 0.027 271.9)
-
Step 200
200
#CCD8FC
oklch(88.5% 0.051 270.8)
-
Step 300
300
#AABEFC
oklch(80.9% 0.091 270.5)
-
Step 400
400
#7E9AFB
oklch(70.7% 0.146 270.2)
-
Step 500
500
#5F7DF9
oklch(63.1% 0.187 270.1)
-
Step 600
600
#4862E8
oklch(55.5% 0.204 270.1)
-
Step 700
700 (this color)
#3B51CA
oklch(49.3% 0.188 270.1)
-
Step 800
800
#3043A3
oklch(42.8% 0.156 270)
-
Step 900
900
#2A3A81
oklch(37.8% 0.121 270.1)
-
Step 950
950
#18224C
oklch(26.9% 0.079 270.3)
#3B51CA 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) | #0064CE | 0.051 |
| Deuteranopia (no green cones) | #0057C8 | 0.037 |
| Tritanopia (no blue cones) | #006F86 | 0.150 |
| Achromatopsia (no color) | #5E5E5E | 0.189 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3B51CA
#3B51CA
oklch(49.3% 0.188 270.1)
- #775E00
#775E00
oklch(49.3% 0.101 90.6)
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 #3B51CA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Warm Blue #4B57DB ΔE 0.037
- Blue Blue #2242C7 ΔE 0.047
- Blue With A Hint Of Purple #533CC6 ΔE 0.051
- Majorelle Blue #3F37C9 ΔE 0.053
- Blurple #5539CC ΔE 0.056
- Iris #6258C4 ΔE 0.059
- Azul #1D5DEC ΔE 0.060
- Bluey Purple #6241C7 ΔE 0.061
Use #3B51CA 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.