#3D70B3
Closest named color: French Blue (#436BAD). oklch(54.2% 0.119 256), rgb(61, 112, 179).
Aa
White text reads best on this color (5.03:1).
About this color
#3D70B3 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 54%, its chroma 0.119 and its hue 256°. Its hue sits on the cool side of the wheel. The nearest named color is French Blue (#436BAD), ΔE 0.015 away. White text reads best on it, at 5.03:1.
| Hue family | Blues |
| Lightness | medium-dark (54%) |
| Chroma | moderately saturated (0.119) |
| Temperature | cool |
| Nearest name | French Blue (#436BAD) |
| Black text | 4.16:1 |
| White text | 5.03:1 |
Values
| HEX | #3D70B3 |
| RGB | rgb(61, 112, 179) |
| HSL | hsl(214, 49%, 47%) |
| OKLCH | oklch(54.2% 0.119 256) |
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 #3D70B3 | 5.03:1 | AA | Lc -80.0 | Fine for body text |
| Black text on #3D70B3 | 4.16:1 | AA large text | Lc 29.5 | Dividers and decoration only |
| #3D70B3 text on white | 5.03:1 | AA | Lc 74.6 | Content text, not long reading |
| #3D70B3 text on black | 4.16:1 | AA large text | Lc -27.1 | 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
#CDDAED
oklch(88.4% 0.03 257.8)
-
Step 300
300
#AAC3E3
oklch(80.9% 0.053 254.7)
-
Step 400
400
#7DA3D6
oklch(70.7% 0.086 255.9)
-
Step 500
500
#5C8BCB
oklch(63.1% 0.11 256.4)
-
Step 600
600 (this color)
#3D70B3
oklch(54.2% 0.119 256)
-
Step 700
700
#33619E
oklch(49% 0.111 256.2)
-
Step 800
800
#2B5080
oklch(42.8% 0.091 255.7)
-
Step 900
900
#274267
oklch(37.6% 0.072 256.6)
-
Step 950
950
#17273C
oklch(27% 0.045 255.6)
#3D70B3 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) | #5275B6 | 0.028 |
| Deuteranopia (no green cones) | #426AB2 | 0.016 |
| Tritanopia (no blue cones) | #007F89 | 0.095 |
| Achromatopsia (no color) | #6F6F6F | 0.119 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3D70B3
#3D70B3
oklch(54.2% 0.119 256)
- #956400
#956400
oklch(54.2% 0.114 75.4)
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 #3D70B3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- French Blue #436BAD ΔE 0.015
- Flat Blue #3C73A8 ΔE 0.021
- Windows Blue #3778BF ΔE 0.026
- Mid Blue #276AB3 ΔE 0.027
- Muted Blue #3B719F ΔE 0.033
- Nice Blue #107AB0 ΔE 0.037
- Dull Blue #49759C ΔE 0.044
- Ocean Blue #03719C ΔE 0.051
Use #3D70B3 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.