#4F65BF
Closest named color: French Blue (#436BAD). oklch(53.5% 0.142 270.6), rgb(79, 101, 191).
Aa
White text reads best on this color (5.32:1).
About this color
#4F65BF is a medium-dark, vivid blue. In OKLCH its lightness is 54%, its chroma 0.142 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is French Blue (#436BAD), ΔE 0.038 away. White text reads best on it, at 5.32:1.
| Hue family | Blues |
| Lightness | medium-dark (54%) |
| Chroma | vivid (0.142) |
| Temperature | cool |
| Nearest name | French Blue (#436BAD) |
| Black text | 3.94:1 |
| White text | 5.32:1 |
Values
| HEX | #4F65BF |
| RGB | rgb(79, 101, 191) |
| HSL | hsl(228, 47%, 53%) |
| OKLCH | oklch(53.5% 0.142 270.6) |
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 #4F65BF | 5.32:1 | AA | Lc -81.6 | Fine for body text |
| Black text on #4F65BF | 3.94:1 | AA large text | Lc 27.8 | Dividers and decoration only |
| #4F65BF text on white | 5.32:1 | AA | Lc 76.2 | Fine for body text |
| #4F65BF text on black | 3.94:1 | AA large text | Lc -25.5 | 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
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E5EAF7
oklch(93.7% 0.018 269.1)
-
Step 200
200
#D0D9F1
oklch(88.6% 0.034 269.3)
-
Step 300
300
#B1BFEB
oklch(80.9% 0.064 271.1)
-
Step 400
400
#889DE1
oklch(70.7% 0.103 270.5)
-
Step 500
500
#6C83D8
oklch(63% 0.131 270.8)
-
Step 600
600 (this color)
#4F65BF
oklch(53.5% 0.142 270.6)
-
Step 700
700
#4559AB
oklch(49.1% 0.133 270.6)
-
Step 800
800
#39498A
oklch(42.6% 0.109 270.8)
-
Step 900
900
#313E6F
oklch(37.8% 0.085 270.7)
-
Step 950
950
#1C2441
oklch(26.9% 0.055 270.7)
#4F65BF 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) | #3A70C2 | 0.033 |
| Deuteranopia (no green cones) | #2966BD | 0.037 |
| Tritanopia (no blue cones) | #007989 | 0.125 |
| Achromatopsia (no color) | #6B6B6B | 0.143 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4F65BF
#4F65BF
oklch(53.5% 0.142 270.6)
- #856A00
#856A00
oklch(53.5% 0.109 91.1)
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 #4F65BF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- French Blue #436BAD ΔE 0.038
- Iris #6258C4 ΔE 0.041
- Mid Blue #276AB3 ΔE 0.045
- Dark Periwinkle #665FD1 ΔE 0.045
- Slate Blue #6A5ACD ΔE 0.050
- Windows Blue #3778BF ΔE 0.053
- Royal Blue #4169E1 ΔE 0.053
- Light Indigo #6D5ACF ΔE 0.055
Use #4F65BF 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.