#4366E1
Closest named color: Royal Blue (#4169E1). oklch(55.5% 0.191 267.7), rgb(67, 102, 225).
Aa
White text reads best on this color (4.96:1).
About this color
#4366E1 is a medium-dark, vivid blue. In OKLCH its lightness is 55%, its chroma 0.191 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.007 away. White text reads best on it, at 4.96:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | vivid (0.191) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 4.22:1 |
| White text | 4.96:1 |
Values
| HEX | #4366E1 |
| RGB | rgb(67, 102, 225) |
| HSL | hsl(227, 72%, 57%) |
| OKLCH | oklch(55.5% 0.191 267.7) |
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 #4366E1 | 4.96:1 | AA | Lc -79.3 | Fine for body text |
| Black text on #4366E1 | 4.22:1 | AA large text | Lc 30.2 | Non-text elements, placeholder text |
| #4366E1 text on white | 4.96:1 | AA | Lc 73.9 | Content text, not long reading |
| #4366E1 text on black | 4.22:1 | AA large text | Lc -27.8 | 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
#F2F5FE
oklch(97% 0.012 271.3)
-
Step 100
100
#E2EAFB
oklch(93.6% 0.025 265.6)
-
Step 200
200
#CBD9FA
oklch(88.5% 0.048 267.2)
-
Step 300
300
#A8BFF9
oklch(80.8% 0.086 267.7)
-
Step 400
400
#7B9CF6
oklch(70.7% 0.137 267.6)
-
Step 500
500
#5B80F3
oklch(63.1% 0.177 267.7)
-
Step 600
600 (this color)
#4366E1
oklch(55.5% 0.191 267.7)
-
Step 700
700
#3654C4
oklch(49.1% 0.178 267.8)
-
Step 800
800
#2C469E
oklch(42.7% 0.146 267.4)
-
Step 900
900
#273C7E
oklch(37.8% 0.115 267.4)
-
Step 950
950
#17234A
oklch(26.9% 0.074 268.3)
#4366E1 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) | #0077E5 | 0.048 |
| Deuteranopia (no green cones) | #0069DF | 0.037 |
| Tritanopia (no blue cones) | #00849A | 0.154 |
| Achromatopsia (no color) | #707070 | 0.192 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4366E1
#4366E1
oklch(55.5% 0.191 267.7)
- #8F6E00
#8F6E00
oklch(55.5% 0.114 87.7)
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 #4366E1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.007
- Neon Blue #4361EE ΔE 0.023
- Warm Blue #4B57DB ΔE 0.035
- Cerulean Blue #056EEE ΔE 0.039
- Azul #1D5DEC ΔE 0.043
- Dark Periwinkle #665FD1 ΔE 0.050
- Bright Blue #0165FC ΔE 0.054
- Slate Blue #6A5ACD ΔE 0.061
Use #4366E1 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.