#3B6BBE
Closest named color: Mid Blue (#276AB3). oklch(53.7% 0.14 260.6), rgb(59, 107, 190).
Aa
White text reads best on this color (5.20:1).
About this color
#3B6BBE is a medium-dark, vivid blue. In OKLCH its lightness is 54%, its chroma 0.140 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.025 away. White text reads best on it, at 5.20:1.
| Hue family | Blues |
| Lightness | medium-dark (54%) |
| Chroma | vivid (0.140) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 4.03:1 |
| White text | 5.20:1 |
Values
| HEX | #3B6BBE |
| RGB | rgb(59, 107, 190) |
| HSL | hsl(218, 53%, 49%) |
| OKLCH | oklch(53.7% 0.14 260.6) |
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 #3B6BBE | 5.20:1 | AA | Lc -80.9 | Fine for body text |
| Black text on #3B6BBE | 4.03:1 | AA large text | Lc 28.6 | Dividers and decoration only |
| #3B6BBE text on white | 5.20:1 | AA | Lc 75.5 | Fine for body text |
| #3B6BBE text on black | 4.03:1 | AA large text | Lc -26.2 | 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
#CCDAF1
oklch(88.5% 0.035 260.4)
-
Step 300
300
#AAC2EA
oklch(81% 0.063 260.6)
-
Step 400
400
#7CA1E0
oklch(70.7% 0.102 260.7)
-
Step 500
500
#5B88D7
oklch(63% 0.13 261)
-
Step 600
600 (this color)
#3B6BBE
oklch(53.7% 0.14 260.6)
-
Step 700
700
#325EAA
oklch(49.1% 0.131 260.5)
-
Step 800
800
#2A4D89
oklch(42.6% 0.108 260.5)
-
Step 900
900
#26416E
oklch(37.8% 0.084 260.1)
-
Step 950
950
#172640
oklch(27% 0.053 260.8)
#3B6BBE 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) | #4373C1 | 0.024 |
| Deuteranopia (no green cones) | #2C67BC | 0.018 |
| Tritanopia (no blue cones) | #007E8B | 0.113 |
| Achromatopsia (no color) | #6D6D6D | 0.140 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3B6BBE
#3B6BBE
oklch(53.7% 0.14 260.6)
- #8F6500
#8F6500
oklch(53.7% 0.111 80)
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 #3B6BBE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.025
- French Blue #436BAD ΔE 0.027
- Windows Blue #3778BF ΔE 0.035
- Flat Blue #3C73A8 ΔE 0.045
- Nice Blue #107AB0 ΔE 0.055
- Muted Blue #3B719F ΔE 0.055
- Royal Blue #4169E1 ΔE 0.056
- Iris #6258C4 ΔE 0.065
Use #3B6BBE 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.