#4F64BB
Closest named color: French Blue (#436BAD). oklch(53.1% 0.138 270.8), rgb(79, 100, 187).
Aa
White text reads best on this color (5.42:1).
About this color
#4F64BB is a medium-dark, moderately saturated blue. In OKLCH its lightness is 53%, its chroma 0.138 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is French Blue (#436BAD), ΔE 0.034 away. White text reads best on it, at 5.42:1.
| Hue family | Blues |
| Lightness | medium-dark (53%) |
| Chroma | moderately saturated (0.138) |
| Temperature | cool |
| Nearest name | French Blue (#436BAD) |
| Black text | 3.87:1 |
| White text | 5.42:1 |
Values
| HEX | #4F64BB |
| RGB | rgb(79, 100, 187) |
| HSL | hsl(228, 44%, 52%) |
| OKLCH | oklch(53.1% 0.138 270.8) |
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 #4F64BB | 5.42:1 | AA | Lc -82.2 | Fine for body text |
| Black text on #4F64BB | 3.87:1 | AA large text | Lc 27.2 | Dividers and decoration only |
| #4F64BB text on white | 5.42:1 | AA | Lc 76.8 | Fine for body text |
| #4F64BB text on black | 3.87:1 | AA large text | Lc -24.9 | 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
#D0D8F1
oklch(88.4% 0.035 271.5)
-
Step 300
300
#B1BFEA
oklch(80.8% 0.063 270.8)
-
Step 400
400
#899DDF
oklch(70.6% 0.1 270.8)
-
Step 500
500
#6D84D6
oklch(63.2% 0.126 270.6)
-
Step 600
600 (this color)
#4F64BB
oklch(53.1% 0.138 270.8)
-
Step 700
700
#4659A9
oklch(49% 0.129 270.9)
-
Step 800
800
#3A4989
oklch(42.6% 0.107 271.3)
-
Step 900
900
#313E6D
oklch(37.7% 0.082 270.4)
-
Step 950
950
#1D2540
oklch(27.1% 0.052 270.2)
#4F64BB 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 | 0.033 |
| Deuteranopia (no green cones) | #2C65B9 | 0.036 |
| Tritanopia (no blue cones) | #007786 | 0.123 |
| Achromatopsia (no color) | #6A6A6A | 0.138 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4F64BB
#4F64BB
oklch(53.1% 0.138 270.8)
- #846800
#846800
oklch(53% 0.108 90.1)
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 #4F64BB, closest first.
No curated palette has a color within ΔE 0.04 of #4F64BB.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- French Blue #436BAD ΔE 0.034
- Iris #6258C4 ΔE 0.041
- Mid Blue #276AB3 ΔE 0.043
- Dark Periwinkle #665FD1 ΔE 0.049
- Slate Blue #6A5ACD ΔE 0.053
- Windows Blue #3778BF ΔE 0.055
- Light Indigo #6D5ACF ΔE 0.058
- Flat Blue #3C73A8 ΔE 0.058
Use #4F64BB 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.