#3E70B5
Closest named color: French Blue (#436BAD). oklch(54.4% 0.121 256.9), rgb(62, 112, 181).
Aa
White text reads best on this color (5.01:1).
About this color
#3E70B5 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 54%, its chroma 0.121 and its hue 257°. 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 (0.121) |
| Temperature | cool |
| Nearest name | French Blue (#436BAD) |
| Black text | 4.18:1 |
| White text | 5.01:1 |
Values
| HEX | #3E70B5 |
| RGB | rgb(62, 112, 181) |
| HSL | hsl(215, 49%, 48%) |
| OKLCH | oklch(54.4% 0.121 256.9) |
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 #3E70B5 | 5.01:1 | AA | Lc -79.8 | Fine for body text |
| Black text on #3E70B5 | 4.18:1 | AA large text | Lc 29.7 | Dividers and decoration only |
| #3E70B5 text on white | 5.01:1 | AA | Lc 74.4 | Content text, not long reading |
| #3E70B5 text on black | 4.18:1 | 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
#E3EAF5
oklch(93.5% 0.017 259.4)
-
Step 200
200
#CDDAEE
oklch(88.5% 0.031 258.9)
-
Step 300
300
#ABC3E4
oklch(81% 0.054 256.4)
-
Step 400
400
#7DA3D7
oklch(70.8% 0.087 256.4)
-
Step 500
500
#5C8BCC
oklch(63.1% 0.111 256.7)
-
Step 600
600 (this color)
#3E70B5
oklch(54.4% 0.121 256.9)
-
Step 700
700
#33619F
oklch(49.1% 0.112 256.5)
-
Step 800
800
#2B4F81
oklch(42.6% 0.093 257)
-
Step 900
900
#274268
oklch(37.7% 0.073 257.1)
-
Step 950
950
#17273D
oklch(27% 0.047 256.6)
#3E70B5 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) | #5175B8 | 0.026 |
| Deuteranopia (no green cones) | #406AB4 | 0.016 |
| Tritanopia (no blue cones) | #00808A | 0.098 |
| Achromatopsia (no color) | #6F6F6F | 0.121 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3E70B5
#3E70B5
oklch(54.4% 0.121 256.9)
- #946500
#946500
oklch(54.3% 0.114 76.9)
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 #3E70B5, 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 0.024
- Windows Blue #3778BF ΔE 0.024
- Mid Blue #276AB3 ΔE 0.028
- Muted Blue #3B719F ΔE 0.036
- Nice Blue #107AB0 ΔE 0.038
- Dull Blue #49759C ΔE 0.047
- Steel Blue #4682B4 ΔE 0.054
Use #3E70B5 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.