#3651A9
Closest named color: Dusk Blue (#26538D). oklch(46.4% 0.145 267.6), rgb(54, 81, 169).
Aa
White text reads best on this color (7.22:1).
About this color
#3651A9 is a medium-dark, vivid blue. In OKLCH its lightness is 46%, its chroma 0.145 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.050 away. White text reads best on it, at 7.22:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | vivid (0.145) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.90:1 |
| White text | 7.22:1 |
Values
| HEX | #3651A9 |
| RGB | rgb(54, 81, 169) |
| HSL | hsl(226, 52%, 44%) |
| OKLCH | oklch(46.4% 0.145 267.6) |
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 #3651A9 | 7.22:1 | AAA | Lc -89.7 | Fine for body text |
| Black text on #3651A9 | 2.90:1 | Fails | Lc 19.3 | Dividers and decoration only |
| #3651A9 text on white | 7.22:1 | AAA | Lc 84.7 | Fine for body text |
| #3651A9 text on black | 2.90:1 | Fails | Lc -17.3 | 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
#F3F5FC
oklch(97.1% 0.01 273.4)
-
Step 100
100
#E4EAF8
oklch(93.7% 0.02 267.3)
-
Step 200
200
#CED9F4
oklch(88.5% 0.039 267.9)
-
Step 300
300
#ADC0EF
oklch(81% 0.07 267.6)
-
Step 400
400
#829EE7
oklch(70.8% 0.112 267.5)
-
Step 500
500
#6484E0
oklch(63.2% 0.143 267.7)
-
Step 600
600
#4C6BCD
oklch(55.5% 0.155 267.9)
-
Step 700
700 (this color)
#3651A9
oklch(46.4% 0.145 267.6)
-
Step 800
800
#324990
oklch(42.6% 0.12 267.6)
-
Step 900
900
#2C3E73
oklch(37.7% 0.093 267.7)
-
Step 950
950
#1A2543
oklch(27.1% 0.058 267.3)
#3651A9 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) | #1B5DAC | 0.035 |
| Deuteranopia (no green cones) | #0052A7 | 0.035 |
| Tritanopia (no blue cones) | #006675 | 0.119 |
| Achromatopsia (no color) | #575757 | 0.145 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3651A9
#3651A9
oklch(46.4% 0.145 267.6)
- #6F5500
#6F5500
oklch(46.4% 0.095 88)
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 #3651A9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.050
- Blueberry #464196 ΔE 0.050
- Denim Blue #3B5B92 ΔE 0.051
- Cobalt #1E488F ΔE 0.056
- Twilight #4E518B ΔE 0.057
- Dusky Blue #475F94 ΔE 0.061
- Light Navy Blue #2E5A88 ΔE 0.064
- Blue Blue #2242C7 ΔE 0.065
Use #3651A9 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.