#4C64BB
Closest named color: French Blue (#436BAD). oklch(52.9% 0.139 269.6), rgb(76, 100, 187).
Aa
White text reads best on this color (5.45:1).
About this color
#4C64BB is a medium-dark, moderately saturated blue. In OKLCH its lightness is 53%, its chroma 0.139 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is French Blue (#436BAD), ΔE 0.033 away. White text reads best on it, at 5.45:1.
| Hue family | Blues |
| Lightness | medium-dark (53%) |
| Chroma | moderately saturated (0.139) |
| Temperature | cool |
| Nearest name | French Blue (#436BAD) |
| Black text | 3.84:1 |
| White text | 5.45:1 |
Values
| HEX | #4C64BB |
| RGB | rgb(76, 100, 187) |
| HSL | hsl(227, 45%, 52%) |
| OKLCH | oklch(52.9% 0.139 269.6) |
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 #4C64BB | 5.45:1 | AA | Lc -82.3 | Fine for body text |
| Black text on #4C64BB | 3.84:1 | AA large text | Lc 27.1 | Dividers and decoration only |
| #4C64BB text on white | 5.45:1 | AA | Lc 77.0 | Fine for body text |
| #4C64BB text on black | 3.84:1 | AA large text | Lc -24.7 | 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
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E5EAF6
oklch(93.7% 0.017 267.8)
-
Step 200
200
#D0D9F1
oklch(88.6% 0.034 269.3)
-
Step 300
300
#B0BFEA
oklch(80.8% 0.063 269.9)
-
Step 400
400
#889EE0
oklch(70.8% 0.1 269.6)
-
Step 500
500
#6B84D7
oklch(63.1% 0.128 269.8)
-
Step 600
600 (this color)
#4C64BB
oklch(52.9% 0.139 269.6)
-
Step 700
700
#445AA9
oklch(49.1% 0.129 269.5)
-
Step 800
800
#384A89
oklch(42.7% 0.107 269.5)
-
Step 900
900
#303E6E
oklch(37.7% 0.084 269.8)
-
Step 950
950
#1C2540
oklch(27.1% 0.052 268.8)
#4C64BB 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) | #3B6FBE | 0.031 |
| Deuteranopia (no green cones) | #2A65B9 | 0.033 |
| Tritanopia (no blue cones) | #007886 | 0.123 |
| Achromatopsia (no color) | #696969 | 0.139 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4C64BB
#4C64BB
oklch(52.9% 0.139 269.6)
- #846700
#846700
oklch(52.8% 0.108 89.2)
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 #4C64BB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- French Blue #436BAD ΔE 0.033
- Mid Blue #276AB3 ΔE 0.040
- Iris #6258C4 ΔE 0.044
- Dark Periwinkle #665FD1 ΔE 0.051
- Windows Blue #3778BF ΔE 0.054
- Slate Blue #6A5ACD ΔE 0.056
- Flat Blue #3C73A8 ΔE 0.057
- Royal Blue #4169E1 ΔE 0.059
Use #4C64BB 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.