#3B6CBC
Closest named color: Mid Blue (#276AB3). oklch(53.8% 0.136 259.7), rgb(59, 108, 188).
Aa
White text reads best on this color (5.17:1).
About this color
#3B6CBC is a medium-dark, moderately saturated blue. In OKLCH its lightness is 54%, its chroma 0.136 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.023 away. White text reads best on it, at 5.17:1.
| Hue family | Blues |
| Lightness | medium-dark (54%) |
| Chroma | moderately saturated (0.136) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 4.05:1 |
| White text | 5.17:1 |
Values
| HEX | #3B6CBC |
| RGB | rgb(59, 108, 188) |
| HSL | hsl(217, 52%, 48%) |
| OKLCH | oklch(53.8% 0.136 259.7) |
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 #3B6CBC | 5.17:1 | AA | Lc -80.7 | Fine for body text |
| Black text on #3B6CBC | 4.05:1 | AA large text | Lc 28.7 | Dividers and decoration only |
| #3B6CBC text on white | 5.17:1 | AA | Lc 75.3 | Fine for body text |
| #3B6CBC text on black | 4.05:1 | AA large text | Lc -26.4 | 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
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E3EAF6
oklch(93.5% 0.018 261.3)
-
Step 200
200
#CCDAF0
oklch(88.5% 0.034 259.4)
-
Step 300
300
#AAC2E9
oklch(80.9% 0.061 260.1)
-
Step 400
400
#7CA2DE
oklch(70.8% 0.098 259.3)
-
Step 500
500
#5B89D5
oklch(63.1% 0.126 260)
-
Step 600
600 (this color)
#3B6CBC
oklch(53.8% 0.136 259.7)
-
Step 700
700
#325FA8
oklch(49.2% 0.127 259.6)
-
Step 800
800
#2A4E88
oklch(42.8% 0.105 259.5)
-
Step 900
900
#26416D
oklch(37.7% 0.083 259.7)
-
Step 950
950
#172640
oklch(27% 0.053 260.8)
#3B6CBC 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) | #4673BF | 0.024 |
| Deuteranopia (no green cones) | #3167BA | 0.018 |
| Tritanopia (no blue cones) | #007E8B | 0.108 |
| Achromatopsia (no color) | #6D6D6D | 0.136 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3B6CBC
#3B6CBC
oklch(53.8% 0.136 259.7)
- #906500
#906500
oklch(53.8% 0.112 79.4)
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 #3B6CBC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.023
- French Blue #436BAD ΔE 0.024
- Windows Blue #3778BF ΔE 0.032
- Flat Blue #3C73A8 ΔE 0.041
- Nice Blue #107AB0 ΔE 0.051
- Muted Blue #3B719F ΔE 0.051
- Royal Blue #4169E1 ΔE 0.059
- Dull Blue #49759C ΔE 0.063
Use #3B6CBC 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.