#3B63A5
Closest named color: French Blue (#436BAD). oklch(50.3% 0.115 259.9), rgb(59, 99, 165).
Aa
White text reads best on this color (5.97:1).
About this color
#3B63A5 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 50%, its chroma 0.115 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is French Blue (#436BAD), ΔE 0.027 away. White text reads best on it, at 5.97:1.
| Hue family | Blues |
| Lightness | medium-dark (50%) |
| Chroma | moderately saturated (0.115) |
| Temperature | cool |
| Nearest name | French Blue (#436BAD) |
| Black text | 3.51:1 |
| White text | 5.97:1 |
Values
| HEX | #3B63A5 |
| RGB | rgb(59, 99, 165) |
| HSL | hsl(217, 47%, 44%) |
| OKLCH | oklch(50.3% 0.115 259.9) |
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 #3B63A5 | 5.97:1 | AA | Lc -84.9 | Fine for body text |
| Black text on #3B63A5 | 3.51:1 | AA large text | Lc 24.4 | Dividers and decoration only |
| #3B63A5 text on white | 5.97:1 | AA | Lc 79.7 | Fine for body text |
| #3B63A5 text on black | 3.51:1 | AA large text | Lc -22.2 | 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
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E4EAF5
oklch(93.6% 0.016 262.8)
-
Step 200
200
#CDDAEE
oklch(88.5% 0.031 258.9)
-
Step 300
300
#ACC2E5
oklch(80.9% 0.055 259.6)
-
Step 400
400
#80A2D8
oklch(70.8% 0.088 259.5)
-
Step 500
500
#6089CE
oklch(63% 0.114 260.4)
-
Step 600
600
#4672BB
oklch(55.5% 0.124 260)
-
Step 700
700 (this color)
#3B63A5
oklch(50.3% 0.115 259.9)
-
Step 800
800
#2E4E83
oklch(42.7% 0.096 260)
-
Step 900
900
#294169
oklch(37.6% 0.075 260.1)
-
Step 950
950
#19263D
oklch(26.9% 0.047 261.3)
#3B63A5 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) | #4669A8 | 0.022 |
| Deuteranopia (no green cones) | #375FA4 | 0.013 |
| Tritanopia (no blue cones) | #00727C | 0.095 |
| Achromatopsia (no color) | #636363 | 0.115 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3B63A5
#3B63A5
oklch(50.3% 0.115 259.9)
- #835C00
#835C00
oklch(50.3% 0.104 79.8)
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 #3B63A5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- French Blue #436BAD ΔE 0.027
- Mid Blue #276AB3 ΔE 0.029
- Dusky Blue #475F94 ΔE 0.029
- Denim Blue #3B5B92 ΔE 0.035
- Denim #3B638C ΔE 0.041
- Muted Blue #3B719F ΔE 0.044
- Flat Blue #3C73A8 ΔE 0.046
- Peacock Blue #016795 ΔE 0.046
Use #3B63A5 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.