#3D6ECC
Closest named color: Royal Blue (#4169E1). oklch(55.3% 0.155 261.9), rgb(61, 110, 204).
Aa
White text reads best on this color (4.88:1).
About this color
#3D6ECC is a medium-dark, vivid blue. In OKLCH its lightness is 55%, its chroma 0.155 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.036 away. White text reads best on it, at 4.88:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | vivid (0.155) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 4.30:1 |
| White text | 4.88:1 |
Values
| HEX | #3D6ECC |
| RGB | rgb(61, 110, 204) |
| HSL | hsl(219, 58%, 52%) |
| OKLCH | oklch(55.3% 0.155 261.9) |
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 #3D6ECC | 4.88:1 | AA | Lc -78.9 | Fine for body text |
| Black text on #3D6ECC | 4.30:1 | AA large text | Lc 30.6 | Non-text elements, placeholder text |
| #3D6ECC text on white | 4.88:1 | AA | Lc 73.5 | Content text, not long reading |
| #3D6ECC text on black | 4.30:1 | AA large text | Lc -28.2 | 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
#F2F6FC
oklch(97.2% 0.009 258.3)
-
Step 100
100
#E3EAF8
oklch(93.6% 0.02 264.5)
-
Step 200
200
#CBDAF4
oklch(88.5% 0.039 261.5)
-
Step 300
300
#A8C1EF
oklch(80.8% 0.071 262.5)
-
Step 400
400
#7AA0E6
oklch(70.6% 0.111 262.1)
-
Step 500
500
#5887DF
oklch(63.1% 0.143 261.9)
-
Step 600
600 (this color)
#3D6ECC
oklch(55.3% 0.155 261.9)
-
Step 700
700
#305CB1
oklch(49.1% 0.144 262)
-
Step 800
800
#284C90
oklch(42.8% 0.12 261.7)
-
Step 900
900
#254073
oklch(37.8% 0.093 261.9)
-
Step 950
950
#162643
oklch(27.1% 0.058 261.5)
#3D6ECC 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) | #3E78D0 | 0.027 |
| Deuteranopia (no green cones) | #1F6BCA | 0.025 |
| Tritanopia (no blue cones) | #008493 | 0.125 |
| Achromatopsia (no color) | #717171 | 0.155 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3D6ECC
#3D6ECC
oklch(55.3% 0.155 261.9)
- #946B00
#946B00
oklch(55.5% 0.114 82)
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 #3D6ECC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.036
- Windows Blue #3778BF ΔE 0.037
- Mid Blue #276AB3 ΔE 0.045
- French Blue #436BAD ΔE 0.048
- Cerulean Blue #056EEE ΔE 0.057
- Dark Periwinkle #665FD1 ΔE 0.059
- Flat Blue #3C73A8 ΔE 0.061
- Warm Blue #4B57DB ΔE 0.062
Use #3D6ECC 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.