#3B71B2
Closest named color: French Blue (#436BAD). oklch(54.3% 0.117 254.4), rgb(59, 113, 178).
Aa
White text reads best on this color (5.01:1).
About this color
#3B71B2 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 54%, its chroma 0.117 and its hue 254°. Its hue sits on the cool side of the wheel. The nearest named color is French Blue (#436BAD), ΔE 0.017 away. White text reads best on it, at 5.01:1.
| Hue family | Blues |
| Lightness | medium-dark (54%) |
| Chroma | moderately saturated (0.117) |
| Temperature | cool |
| Nearest name | French Blue (#436BAD) |
| Black text | 4.19:1 |
| White text | 5.01:1 |
Values
| HEX | #3B71B2 |
| RGB | rgb(59, 113, 178) |
| HSL | hsl(213, 50%, 46%) |
| OKLCH | oklch(54.3% 0.117 254.4) |
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 #3B71B2 | 5.01:1 | AA | Lc -79.8 | Fine for body text |
| Black text on #3B71B2 | 4.19:1 | AA large text | Lc 29.7 | Dividers and decoration only |
| #3B71B2 text on white | 5.01:1 | AA | Lc 74.4 | Content text, not long reading |
| #3B71B2 text on black | 4.19:1 | AA large text | Lc -27.3 | 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
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E3EBF4
oklch(93.7% 0.015 251.2)
-
Step 200
200
#CCDBED
oklch(88.6% 0.03 253)
-
Step 300
300
#AAC3E3
oklch(80.9% 0.053 254.7)
-
Step 400
400
#7CA3D5
oklch(70.6% 0.085 254.9)
-
Step 500
500
#5A8CC9
oklch(63.1% 0.107 254.1)
-
Step 600
600 (this color)
#3B71B2
oklch(54.3% 0.117 254.4)
-
Step 700
700
#31629D
oklch(49.1% 0.109 254.4)
-
Step 800
800
#29507F
oklch(42.6% 0.09 254.3)
-
Step 900
900
#264366
oklch(37.8% 0.07 254.1)
-
Step 950
950
#17273C
oklch(27% 0.045 255.6)
#3B71B2 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) | #5475B5 | 0.030 |
| Deuteranopia (no green cones) | #436AB1 | 0.020 |
| Tritanopia (no blue cones) | #008089 | 0.093 |
| Achromatopsia (no color) | #6F6F6F | 0.117 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3B71B2
#3B71B2
oklch(54.3% 0.117 254.4)
- #966400
#966400
oklch(54.3% 0.115 74.8)
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 #3B71B2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- French Blue #436BAD ΔE 0.017
- Flat Blue #3C73A8 ΔE 0.018
- Windows Blue #3778BF ΔE 0.025
- Mid Blue #276AB3 ΔE 0.028
- Muted Blue #3B719F ΔE 0.030
- Nice Blue #107AB0 ΔE 0.033
- Dull Blue #49759C ΔE 0.041
- Ocean Blue #03719C ΔE 0.048
Use #3B71B2 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.