#3659A1
Closest named color: Denim Blue (#3B5B92). oklch(47.6% 0.123 263), rgb(54, 89, 161).
Aa
White text reads best on this color (6.77:1).
About this color
#3659A1 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 48%, its chroma 0.123 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Denim Blue (#3B5B92), ΔE 0.027 away. White text reads best on it, at 6.77:1.
| Hue family | Blues |
| Lightness | medium-dark (48%) |
| Chroma | moderately saturated (0.123) |
| Temperature | cool |
| Nearest name | Denim Blue (#3B5B92) |
| Black text | 3.10:1 |
| White text | 6.77:1 |
Values
| HEX | #3659A1 |
| RGB | rgb(54, 89, 161) |
| HSL | hsl(220, 50%, 42%) |
| OKLCH | oklch(47.6% 0.123 263) |
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 #3659A1 | 6.77:1 | AA | Lc -88.1 | Fine for body text |
| Black text on #3659A1 | 3.10:1 | AA large text | Lc 20.9 | Dividers and decoration only |
| #3659A1 text on white | 6.77:1 | AA | Lc 83.1 | Fine for body text |
| #3659A1 text on black | 3.10:1 | AA large text | Lc -18.8 | 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
#F3F6FB
oklch(97.2% 0.007 260.7)
-
Step 100
100
#E4EAF6
oklch(93.6% 0.017 264.5)
-
Step 200
200
#CEDAF0
oklch(88.6% 0.033 262.7)
-
Step 300
300
#ADC1E8
oklch(80.9% 0.06 263.7)
-
Step 400
400
#81A0DD
oklch(70.6% 0.096 263.4)
-
Step 500
500
#6288D3
oklch(63.2% 0.121 263)
-
Step 600
600
#4970C0
oklch(55.6% 0.132 263.2)
-
Step 700
700 (this color)
#3659A1
oklch(47.6% 0.123 263)
-
Step 800
800
#304D86
oklch(42.7% 0.101 262.6)
-
Step 900
900
#2B406C
oklch(37.7% 0.08 263.7)
-
Step 950
950
#19263F
oklch(27% 0.05 262.6)
#3659A1 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) | #3760A4 | 0.020 |
| Deuteranopia (no green cones) | #2557A0 | 0.018 |
| Tritanopia (no blue cones) | #006A75 | 0.103 |
| Achromatopsia (no color) | #5B5B5B | 0.123 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3659A1
#3659A1
oklch(47.6% 0.123 263)
- #775600
#775600
oklch(47.5% 0.098 82.7)
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 #3659A1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Denim Blue #3B5B92 ΔE 0.027
- Dusky Blue #475F94 ΔE 0.036
- Dusk Blue #26538D ΔE 0.040
- Light Navy Blue #2E5A88 ΔE 0.043
- Twilight #4E518B ΔE 0.046
- Denim #3B638C ΔE 0.050
- Mid Blue #276AB3 ΔE 0.050
- Peacock Blue #016795 ΔE 0.054
Use #3659A1 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.