#365EFB
Closest named color: Neon Blue (#4361EE). oklch(55.6% 0.237 266.9), rgb(54, 94, 251).
Aa
White text reads best on this color (5.05:1).
About this color
#365EFB is a medium-dark, vivid blue. In OKLCH its lightness is 56%, its chroma 0.237 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is Neon Blue (#4361EE), ΔE 0.024 away. White text reads best on it, at 5.05:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | vivid (0.237) |
| Temperature | cool |
| Nearest name | Neon Blue (#4361EE) |
| Black text | 4.15:1 |
| White text | 5.05:1 |
Values
| HEX | #365EFB |
| RGB | rgb(54, 94, 251) |
| HSL | hsl(228, 96%, 60%) |
| OKLCH | oklch(55.6% 0.237 266.9) |
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 #365EFB | 5.05:1 | AA | Lc -79.6 | Fine for body text |
| Black text on #365EFB | 4.15:1 | AA large text | Lc 29.9 | Dividers and decoration only |
| #365EFB text on white | 5.05:1 | AA | Lc 74.2 | Content text, not long reading |
| #365EFB text on black | 4.15:1 | AA large text | Lc -27.5 | 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
#E1EAFF
oklch(93.7% 0.03 267.2)
-
Step 200
200
#C9D9FF
oklch(88.6% 0.055 267.2)
-
Step 300
300
#A5BFFF
oklch(80.9% 0.095 267.2)
-
Step 400
400
#769BFF
oklch(70.7% 0.152 267.2)
-
Step 500
500
#537EFF
oklch(63.1% 0.197 266.8)
-
Step 600
600 (this color)
#365EFB
oklch(55.6% 0.237 266.9)
-
Step 700
700
#2A4CDB
oklch(49.1% 0.22 266.9)
-
Step 800
800
#2340B1
oklch(42.8% 0.182 266.9)
-
Step 900
900
#20388C
oklch(37.8% 0.143 267)
-
Step 950
950
#132252
oklch(27.1% 0.09 267.1)
#365EFB 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) | #0078FF | 0.058 |
| Deuteranopia (no green cones) | #0065F8 | 0.026 |
| Tritanopia (no blue cones) | #0087A4 | 0.183 |
| Achromatopsia (no color) | #6F6F6F | 0.238 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #365EFB
#365EFB
oklch(55.6% 0.237 266.9)
- #906E00
#906E00
oklch(55.7% 0.114 87.1)
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 #365EFB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Neon Blue #4361EE ΔE 0.024
- Bright Blue #0165FC ΔE 0.025
- Azul #1D5DEC ΔE 0.030
- Electric Blue #0652FF ΔE 0.041
- Cerulean Blue #056EEE ΔE 0.044
- Royal Blue #4169E1 ΔE 0.049
- Warm Blue #4B57DB ΔE 0.054
- Clear Blue #247AFD ΔE 0.063
Use #365EFB 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.