#3659AB
Closest named color: Denim Blue (#3B5B92). oklch(48.2% 0.137 264.4), rgb(54, 89, 171).
Aa
White text reads best on this color (6.61:1).
About this color
#3659AB is a medium-dark, moderately saturated blue. In OKLCH its lightness is 48%, its chroma 0.137 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Denim Blue (#3B5B92), ΔE 0.042 away. White text reads best on it, at 6.61:1.
| Hue family | Blues |
| Lightness | medium-dark (48%) |
| Chroma | moderately saturated (0.137) |
| Temperature | cool |
| Nearest name | Denim Blue (#3B5B92) |
| Black text | 3.17:1 |
| White text | 6.61:1 |
Values
| HEX | #3659AB |
| RGB | rgb(54, 89, 171) |
| HSL | hsl(222, 52%, 44%) |
| OKLCH | oklch(48.2% 0.137 264.4) |
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 #3659AB | 6.61:1 | AA | Lc -87.5 | Fine for body text |
| Black text on #3659AB | 3.17:1 | AA large text | Lc 21.6 | Dividers and decoration only |
| #3659AB text on white | 6.61:1 | AA | Lc 82.4 | Fine for body text |
| #3659AB text on black | 3.17:1 | AA large text | Lc -19.5 | 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
#F2F5FC
oklch(97% 0.01 267.4)
-
Step 100
100
#E3EAF7
oklch(93.6% 0.019 263)
-
Step 200
200
#CDD9F2
oklch(88.4% 0.037 265.1)
-
Step 300
300
#ABC1ED
oklch(80.9% 0.067 264.1)
-
Step 400
400
#7F9FE3
oklch(70.6% 0.106 264.5)
-
Step 500
500
#5F86DB
oklch(63% 0.136 264.3)
-
Step 600
600
#476EC9
oklch(55.6% 0.148 264.6)
-
Step 700
700 (this color)
#3659AB
oklch(48.2% 0.137 264.4)
-
Step 800
800
#2F4B8D
oklch(42.7% 0.114 264.7)
-
Step 900
900
#293F70
oklch(37.6% 0.089 264.3)
-
Step 950
950
#182542
oklch(26.9% 0.057 264.6)
#3659AB 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) | #2E62AE | 0.024 |
| Deuteranopia (no green cones) | #1358A9 | 0.027 |
| Tritanopia (no blue cones) | #006C7A | 0.112 |
| Achromatopsia (no color) | #5D5D5D | 0.138 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3659AB
#3659AB
oklch(48.2% 0.137 264.4)
- #785900
#785900
oklch(48.3% 0.099 85)
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 #3659AB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Denim Blue #3B5B92 ΔE 0.042
- Mid Blue #276AB3 ΔE 0.046
- Dusky Blue #475F94 ΔE 0.048
- Dusk Blue #26538D ΔE 0.054
- French Blue #436BAD ΔE 0.054
- Twilight #4E518B ΔE 0.058
- Light Navy Blue #2E5A88 ΔE 0.059
- Denim #3B638C ΔE 0.063
Use #3659AB 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.