#3763E9
Closest named color: Neon Blue (#4361EE). oklch(55% 0.209 265.8), rgb(55, 99, 233).
Aa
White text reads best on this color (5.09:1).
About this color
#3763E9 is a medium-dark, vivid blue. In OKLCH its lightness is 55%, its chroma 0.209 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Neon Blue (#4361EE), ΔE 0.014 away. White text reads best on it, at 5.09:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | vivid (0.209) |
| Temperature | cool |
| Nearest name | Neon Blue (#4361EE) |
| Black text | 4.12:1 |
| White text | 5.09:1 |
Values
| HEX | #3763E9 |
| RGB | rgb(55, 99, 233) |
| HSL | hsl(225, 80%, 56%) |
| OKLCH | oklch(55% 0.209 265.8) |
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 #3763E9 | 5.09:1 | AA | Lc -79.9 | Fine for body text |
| Black text on #3763E9 | 4.12:1 | AA large text | Lc 29.5 | Dividers and decoration only |
| #3763E9 text on white | 5.09:1 | AA | Lc 74.5 | Content text, not long reading |
| #3763E9 text on black | 4.12:1 | AA large text | Lc -27.2 | 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
#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
#A4C0FE
oklch(81% 0.093 265.6)
-
Step 400
400
#749CFE
oklch(70.7% 0.15 265.9)
-
Step 500
500
#5280FC
oklch(63.2% 0.191 265.8)
-
Step 600
600 (this color)
#3763E9
oklch(55% 0.209 265.8)
-
Step 700
700
#2C53CC
oklch(49.2% 0.193 265.8)
-
Step 800
800
#2544A5
oklch(42.6% 0.161 266.1)
-
Step 900
900
#223B83
oklch(37.7% 0.125 266.1)
-
Step 950
950
#14234D
oklch(27% 0.08 266.3)
#3763E9 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) | #0077EE | 0.049 |
| Deuteranopia (no green cones) | #0066E6 | 0.026 |
| Tritanopia (no blue cones) | #00859C | 0.165 |
| Achromatopsia (no color) | #6E6E6E | 0.209 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3763E9
#3763E9
oklch(55% 0.209 265.8)
- #8F6C00
#8F6C00
oklch(55.1% 0.113 86.1)
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 #3763E9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Neon Blue #4361EE ΔE 0.014
- Royal Blue #4169E1 ΔE 0.022
- Azul #1D5DEC ΔE 0.026
- Cerulean Blue #056EEE ΔE 0.031
- Bright Blue #0165FC ΔE 0.037
- Warm Blue #4B57DB ΔE 0.037
- Electric Blue #0652FF ΔE 0.059
- Clear Blue #247AFD ΔE 0.060
Use #3763E9 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.