#4E66A1
Closest named color: French Blue (#436BAD). oklch(51.8% 0.098 266.3), rgb(78, 102, 161).
Aa
White text reads best on this color (5.61:1).
About this color
#4E66A1 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 52%, its chroma 0.098 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is French Blue (#436BAD), ΔE 0.023 away. White text reads best on it, at 5.61:1.
| Hue family | Blues |
| Lightness | medium-dark (52%) |
| Chroma | moderately saturated (0.098) |
| Temperature | cool |
| Nearest name | French Blue (#436BAD) |
| Black text | 3.73:1 |
| White text | 5.61:1 |
Values
| HEX | #4E66A1 |
| RGB | rgb(78, 102, 161) |
| HSL | hsl(223, 35%, 47%) |
| OKLCH | oklch(51.8% 0.098 266.3) |
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 #4E66A1 | 5.61:1 | AA | Lc -83.3 | Fine for body text |
| Black text on #4E66A1 | 3.73:1 | AA large text | Lc 26.1 | Dividers and decoration only |
| #4E66A1 text on white | 5.61:1 | AA | Lc 78.0 | Fine for body text |
| #4E66A1 text on black | 3.73:1 | AA large text | Lc -23.8 | 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 700.
-
Step 50
50
#F3F5FA
oklch(97% 0.007 268.5)
-
Step 100
100
#E5EAF3
oklch(93.6% 0.013 262.4)
-
Step 200
200
#D1D9EB
oklch(88.5% 0.026 266.6)
-
Step 300
300
#B2C1E0
oklch(81% 0.047 264.9)
-
Step 400
400
#8BA0D1
oklch(70.8% 0.076 266.5)
-
Step 500
500
#6E88C5
oklch(63.2% 0.097 266)
-
Step 600
600
#5671B1
oklch(55.6% 0.105 265.8)
-
Step 700
700 (this color)
#4E66A1
oklch(51.8% 0.098 266.3)
-
Step 800
800
#3A4D7C
oklch(42.7% 0.082 266.3)
-
Step 900
900
#324063
oklch(37.6% 0.063 266.8)
-
Step 950
950
#1D263A
oklch(27% 0.04 265.3)
#4E66A1 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) | #4F6CA3 | 0.017 |
| Deuteranopia (no green cones) | #4664A0 | 0.012 |
| Tritanopia (no blue cones) | #29737C | 0.088 |
| Achromatopsia (no color) | #676767 | 0.098 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4E66A1
#4E66A1
oklch(51.8% 0.098 266.3)
- #816415
#816415
oklch(51.9% 0.098 86.8)
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 #4E66A1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- French Blue #436BAD ΔE 0.023
- Dusky Blue #475F94 ΔE 0.029
- Muted Blue #3B719F ΔE 0.036
- Flat Blue #3C73A8 ΔE 0.038
- Denim #3B638C ΔE 0.042
- Mid Blue #276AB3 ΔE 0.044
- Denim Blue #3B5B92 ΔE 0.046
- Dull Blue #49759C ΔE 0.046
Use #4E66A1 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.