#3B6FDD
Closest named color: Royal Blue (#4169E1). oklch(56.6% 0.177 263), rgb(59, 111, 221).
Aa
White text reads best on this color (4.66:1).
About this color
#3B6FDD is a medium-dark, vivid blue. In OKLCH its lightness is 57%, its chroma 0.177 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.017 away. White text reads best on it, at 4.66:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | vivid (0.177) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 4.50:1 |
| White text | 4.66:1 |
Values
| HEX | #3B6FDD |
| RGB | rgb(59, 111, 221) |
| HSL | hsl(221, 70%, 55%) |
| OKLCH | oklch(56.6% 0.177 263) |
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 #3B6FDD | 4.66:1 | AA | Lc -77.4 | Fine for body text |
| Black text on #3B6FDD | 4.50:1 | AA | Lc 32.1 | Non-text elements, placeholder text |
| #3B6FDD text on white | 4.66:1 | AA | Lc 72.0 | Content text, not long reading |
| #3B6FDD text on black | 4.50:1 | AA | Lc -29.7 | 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
#F2F6FD
oklch(97.2% 0.01 261.8)
-
Step 100
100
#E2EAFA
oklch(93.6% 0.023 264.5)
-
Step 200
200
#CADAF7
oklch(88.5% 0.044 262.4)
-
Step 300
300
#A6C1F5
oklch(80.9% 0.08 263.3)
-
Step 400
400
#769FF0
oklch(70.7% 0.128 263.1)
-
Step 500
500
#5385EB
oklch(63.2% 0.163 262.9)
-
Step 600
600 (this color)
#3B6FDD
oklch(56.6% 0.177 263)
-
Step 700
700
#2B59BD
oklch(49.1% 0.166 263.1)
-
Step 800
800
#244999
oklch(42.6% 0.138 263.1)
-
Step 900
900
#223E79
oklch(37.6% 0.106 263.2)
-
Step 950
950
#142547
oklch(27% 0.067 262.7)
#3B6FDD 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) | #2D7CE1 | 0.033 |
| Deuteranopia (no green cones) | #006DDB | 0.030 |
| Tritanopia (no blue cones) | #00899B | 0.141 |
| Achromatopsia (no color) | #747474 | 0.178 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3B6FDD
#3B6FDD
oklch(56.6% 0.177 263)
- #976F00
#976F00
oklch(56.7% 0.116 83.5)
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 #3B6FDD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.017
- Cerulean Blue #056EEE ΔE 0.036
- Neon Blue #4361EE ΔE 0.043
- Clear Blue #247AFD ΔE 0.053
- Windows Blue #3778BF ΔE 0.056
- Warm Blue #4B57DB ΔE 0.057
- Azul #1D5DEC ΔE 0.058
- Dark Periwinkle #665FD1 ΔE 0.060
Use #3B6FDD 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.