#4B63BE
Closest named color: French Blue (#436BAD). oklch(52.8% 0.145 269.8), rgb(75, 99, 190).
Aa
White text reads best on this color (5.48:1).
About this color
#4B63BE is a medium-dark, vivid blue. In OKLCH its lightness is 53%, its chroma 0.145 and its hue 270°. 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 5.48:1.
| Hue family | Blues |
| Lightness | medium-dark (53%) |
| Chroma | vivid (0.145) |
| Temperature | cool |
| Nearest name | French Blue (#436BAD) |
| Black text | 3.82:1 |
| White text | 5.48:1 |
Values
| HEX | #4B63BE |
| RGB | rgb(75, 99, 190) |
| HSL | hsl(227, 47%, 52%) |
| OKLCH | oklch(52.8% 0.145 269.8) |
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 #4B63BE | 5.48:1 | AA | Lc -82.5 | Fine for body text |
| Black text on #4B63BE | 3.82:1 | AA large text | Lc 26.9 | Dividers and decoration only |
| #4B63BE text on white | 5.48:1 | AA | Lc 77.1 | Fine for body text |
| #4B63BE text on black | 3.82:1 | AA large text | Lc -24.6 | 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
#F3F5FC
oklch(97.1% 0.01 273.4)
-
Step 100
100
#E5EAF7
oklch(93.7% 0.018 269.1)
-
Step 200
200
#CFD9F2
oklch(88.5% 0.036 268.3)
-
Step 300
300
#B0BFEC
oklch(80.9% 0.066 270.5)
-
Step 400
400
#879DE2
oklch(70.6% 0.104 270.1)
-
Step 500
500
#6A84DA
oklch(63.2% 0.133 269.6)
-
Step 600
600 (this color)
#4B63BE
oklch(52.8% 0.145 269.8)
-
Step 700
700
#4359AC
oklch(49% 0.135 269.7)
-
Step 800
800
#37498B
oklch(42.6% 0.111 269.7)
-
Step 900
900
#303E6F
oklch(37.7% 0.086 269.9)
-
Step 950
950
#1C2541
oklch(27.1% 0.054 269.1)
#4B63BE 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) | #366EC1 | 0.033 |
| Deuteranopia (no green cones) | #2264BC | 0.038 |
| Tritanopia (no blue cones) | #007887 | 0.127 |
| Achromatopsia (no color) | #696969 | 0.145 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4B63BE
#4B63BE
oklch(52.8% 0.145 269.8)
- #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 #4B63BE, 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 0.042
- Dark Periwinkle #665FD1 ΔE 0.048
- Slate Blue #6A5ACD ΔE 0.053
- Royal Blue #4169E1 ΔE 0.055
- Warm Blue #4B57DB ΔE 0.056
- Windows Blue #3778BF ΔE 0.057
Use #4B63BE 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.