#3640A2
Closest named color: Blueberry (#464196). oklch(42.5% 0.157 273.3), rgb(54, 64, 162).
Aa
White text reads best on this color (8.70:1).
About this color
#3640A2 is a dark, vivid blue. In OKLCH its lightness is 42%, its chroma 0.157 and its hue 273°. Its hue sits on the cool side of the wheel. The nearest named color is Blueberry (#464196), ΔE 0.031 away. White text reads best on it, at 8.70:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | vivid (0.157) |
| Temperature | cool |
| Nearest name | Blueberry (#464196) |
| Black text | 2.41:1 |
| White text | 8.70:1 |
Values
| HEX | #3640A2 |
| RGB | rgb(54, 64, 162) |
| HSL | hsl(234, 50%, 42%) |
| OKLCH | oklch(42.5% 0.157 273.3) |
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 #3640A2 | 8.70:1 | AAA | Lc -93.9 | Preferred for body text |
| Black text on #3640A2 | 2.41:1 | Fails | Lc 14.6 | Not readable |
| #3640A2 text on white | 8.70:1 | AAA | Lc 89.4 | Fine for body text |
| #3640A2 text on black | 2.41:1 | Fails | Lc -12.8 | Not readable |
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 800.
-
Step 50
50
#F3F5FE
oklch(97.1% 0.012 276.1)
-
Step 100
100
#E4E9FC
oklch(93.6% 0.026 274.1)
-
Step 200
200
#CED8FC
oklch(88.6% 0.051 273.1)
-
Step 300
300
#ADBDFC
oklch(80.9% 0.091 273.2)
-
Step 400
400
#8498FB
oklch(70.7% 0.146 273.5)
-
Step 500
500
#677BF9
oklch(63.2% 0.188 273.1)
-
Step 600
600
#5160E8
oklch(55.7% 0.204 273)
-
Step 700
700
#434EC9
oklch(49.1% 0.189 273.3)
-
Step 800
800 (this color)
#3640A2
oklch(42.5% 0.157 273.3)
-
Step 900
900
#2E3881
oklch(37.6% 0.123 273.2)
-
Step 950
950
#1B224C
oklch(27.1% 0.078 273)
#3640A2 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) | #0050A5 | 0.049 |
| Deuteranopia (no green cones) | #0046A0 | 0.041 |
| Tritanopia (no blue cones) | #00586A | 0.130 |
| Achromatopsia (no color) | #4B4B4B | 0.157 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3640A2
#3640A2
oklch(42.5% 0.157 273.3)
- #5F4C00
#5F4C00
oklch(42.4% 0.087 92.3)
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 #3640A2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blueberry #464196 ΔE 0.031
- Sapphire #2138AB ΔE 0.036
- Cobalt #1E488F ΔE 0.045
- Dark Slate Blue #483D8B ΔE 0.046
- Blue Blue #2242C7 ΔE 0.062
- Majorelle Blue #3F37C9 ΔE 0.065
- Dusk Blue #26538D ΔE 0.065
- Indigo Blue #3A18B1 ΔE 0.072
Use #3640A2 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.