#3F6EAF
Closest named color: French Blue (#436BAD). oklch(53.6% 0.115 256.9), rgb(63, 110, 175).
Aa
White text reads best on this color (5.17:1).
About this color
#3F6EAF is a medium-dark, moderately saturated blue. In OKLCH its lightness is 54%, its chroma 0.115 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is French Blue (#436BAD), ΔE 0.009 away. White text reads best on it, at 5.17:1.
| Hue family | Blues |
| Lightness | medium-dark (54%) |
| Chroma | moderately saturated (0.115) |
| Temperature | cool |
| Nearest name | French Blue (#436BAD) |
| Black text | 4.06:1 |
| White text | 5.17:1 |
Values
| HEX | #3F6EAF |
| RGB | rgb(63, 110, 175) |
| HSL | hsl(215, 47%, 47%) |
| OKLCH | oklch(53.6% 0.115 256.9) |
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 #3F6EAF | 5.17:1 | AA | Lc -80.8 | Fine for body text |
| Black text on #3F6EAF | 4.06:1 | AA large text | Lc 28.7 | Dividers and decoration only |
| #3F6EAF text on white | 5.17:1 | AA | Lc 75.4 | Fine for body text |
| #3F6EAF text on black | 4.06:1 | AA large text | Lc -26.3 | 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
#E4EAF4
oklch(93.5% 0.015 260.7)
-
Step 200
200
#CDDAEC
oklch(88.4% 0.029 256.5)
-
Step 300
300
#ACC2E2
oklch(80.8% 0.051 257.7)
-
Step 400
400
#7FA3D4
oklch(70.7% 0.082 256.2)
-
Step 500
500
#5F8BC9
oklch(63.1% 0.106 257.1)
-
Step 600
600 (this color)
#3F6EAF
oklch(53.6% 0.115 256.9)
-
Step 700
700
#36619C
oklch(49.1% 0.107 256.7)
-
Step 800
800
#2D4F7F
oklch(42.6% 0.09 257.2)
-
Step 900
900
#294266
oklch(37.7% 0.069 257.5)
-
Step 950
950
#18273C
oklch(27% 0.044 256.9)
#3F6EAF 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) | #5273B2 | 0.027 |
| Deuteranopia (no green cones) | #4268AE | 0.016 |
| Tritanopia (no blue cones) | #007D86 | 0.095 |
| Achromatopsia (no color) | #6D6D6D | 0.115 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F6EAF
#3F6EAF
oklch(53.6% 0.115 256.9)
- #926300
#926300
oklch(53.6% 0.112 76.4)
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 #3F6EAF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- French Blue #436BAD ΔE 0.009
- Flat Blue #3C73A8 ΔE 0.020
- Mid Blue #276AB3 ΔE 0.025
- Muted Blue #3B719F ΔE 0.029
- Windows Blue #3778BF ΔE 0.033
- Nice Blue #107AB0 ΔE 0.040
- Dull Blue #49759C ΔE 0.042
- Ocean Blue #03719C ΔE 0.049
Use #3F6EAF 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.