#3B5FEF
Closest named color: Neon Blue (#4361EE). oklch(54.9% 0.22 267.6), rgb(59, 95, 239).
Aa
White text reads best on this color (5.16:1).
About this color
#3B5FEF is a medium-dark, vivid blue. In OKLCH its lightness is 55%, its chroma 0.220 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Neon Blue (#4361EE), ΔE 0.010 away. White text reads best on it, at 5.16:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | vivid (0.220) |
| Temperature | cool |
| Nearest name | Neon Blue (#4361EE) |
| Black text | 4.06:1 |
| White text | 5.16:1 |
Values
| HEX | #3B5FEF |
| RGB | rgb(59, 95, 239) |
| HSL | hsl(228, 85%, 58%) |
| OKLCH | oklch(54.9% 0.22 267.6) |
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 #3B5FEF | 5.16:1 | AA | Lc -80.3 | Fine for body text |
| Black text on #3B5FEF | 4.06:1 | AA large text | Lc 29.2 | Dividers and decoration only |
| #3B5FEF text on white | 5.16:1 | AA | Lc 74.9 | Content text, not long reading |
| #3B5FEF text on black | 4.06:1 | AA large text | Lc -26.8 | 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 600.
-
Step 50
50
#F1F5FF
oklch(97% 0.014 268.5)
-
Step 100
100
#E1EAFE
oklch(93.6% 0.029 266.4)
-
Step 200
200
#C9D9FF
oklch(88.6% 0.055 267.2)
-
Step 300
300
#A6BFFF
oklch(80.9% 0.095 267.8)
-
Step 400
400
#779BFF
oklch(70.7% 0.152 267.5)
-
Step 500
500
#567DFF
oklch(63% 0.198 267.8)
-
Step 600
600 (this color)
#3B5FEF
oklch(54.9% 0.22 267.6)
-
Step 700
700
#304FD2
oklch(49.1% 0.204 267.6)
-
Step 800
800
#2842AA
oklch(42.8% 0.169 267.7)
-
Step 900
900
#233986
oklch(37.6% 0.132 267.5)
-
Step 950
950
#15224F
oklch(27% 0.084 268.2)
#3B5FEF 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) | #0076F4 | 0.055 |
| Deuteranopia (no green cones) | #0065EC | 0.030 |
| Tritanopia (no blue cones) | #00849E | 0.173 |
| Achromatopsia (no color) | #6D6D6D | 0.220 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3B5FEF
#3B5FEF
oklch(54.9% 0.22 267.6)
- #8D6C00
#8D6C00
oklch(54.9% 0.112 87.4)
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 #3B5FEF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Neon Blue #4361EE ΔE 0.010
- Azul #1D5DEC ΔE 0.024
- Royal Blue #4169E1 ΔE 0.033
- Bright Blue #0165FC ΔE 0.034
- Warm Blue #4B57DB ΔE 0.037
- Cerulean Blue #056EEE ΔE 0.039
- Electric Blue #0652FF ΔE 0.051
- Clear Blue #247AFD ΔE 0.064
Use #3B5FEF 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.