#3660AE
Closest named color: Mid Blue (#276AB3). oklch(50% 0.133 261.6), rgb(54, 96, 174).
Aa
White text reads best on this color (6.10:1).
About this color
#3660AE is a medium-dark, moderately saturated blue. In OKLCH its lightness is 50%, its chroma 0.133 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.028 away. White text reads best on it, at 6.10:1.
| Hue family | Blues |
| Lightness | medium-dark (50%) |
| Chroma | moderately saturated (0.133) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 3.44:1 |
| White text | 6.10:1 |
Values
| HEX | #3660AE |
| RGB | rgb(54, 96, 174) |
| HSL | hsl(219, 53%, 45%) |
| OKLCH | oklch(50% 0.133 261.6) |
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 #3660AE | 6.10:1 | AA | Lc -85.4 | Fine for body text |
| Black text on #3660AE | 3.44:1 | AA large text | Lc 23.9 | Dividers and decoration only |
| #3660AE text on white | 6.10:1 | AA | Lc 80.2 | Fine for body text |
| #3660AE text on black | 3.44:1 | AA large text | Lc -21.7 | 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 700.
-
Step 50
50
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E3EAF7
oklch(93.6% 0.019 263)
-
Step 200
200
#CCDAF1
oklch(88.5% 0.035 260.4)
-
Step 300
300
#AAC2EB
oklch(81% 0.064 261.1)
-
Step 400
400
#7DA1E1
oklch(70.8% 0.102 261.5)
-
Step 500
500
#5C88D9
oklch(63.2% 0.132 261.7)
-
Step 600
600
#4270C6
oklch(55.6% 0.143 261.7)
-
Step 700
700 (this color)
#3660AE
oklch(50% 0.133 261.6)
-
Step 800
800
#2B4D8B
oklch(42.8% 0.11 261.3)
-
Step 900
900
#27406F
oklch(37.6% 0.087 261.9)
-
Step 950
950
#172641
oklch(27% 0.055 261.4)
#3660AE 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) | #3A68B1 | 0.023 |
| Deuteranopia (no green cones) | #245DAC | 0.019 |
| Tritanopia (no blue cones) | #00727E | 0.108 |
| Achromatopsia (no color) | #626262 | 0.133 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3660AE
#3660AE
oklch(50% 0.133 261.6)
- #805C00
#805C00
oklch(49.9% 0.103 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 #3660AE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.028
- French Blue #436BAD ΔE 0.036
- Dusky Blue #475F94 ΔE 0.044
- Denim Blue #3B5B92 ΔE 0.045
- Peacock Blue #016795 ΔE 0.057
- Denim #3B638C ΔE 0.058
- Flat Blue #3C73A8 ΔE 0.058
- Muted Blue #3B719F ΔE 0.059
Use #3660AE 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.