#3655B3
Closest named color: Mid Blue (#276AB3). oklch(48% 0.154 266.8), rgb(54, 85, 179).
Aa
White text reads best on this color (6.75:1).
About this color
#3655B3 is a medium-dark, vivid blue. In OKLCH its lightness is 48%, its chroma 0.154 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.056 away. White text reads best on it, at 6.75:1.
| Hue family | Blues |
| Lightness | medium-dark (48%) |
| Chroma | vivid (0.154) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 3.10:1 |
| White text | 6.75:1 |
Values
| HEX | #3655B3 |
| RGB | rgb(54, 85, 179) |
| HSL | hsl(225, 54%, 46%) |
| OKLCH | oklch(48% 0.154 266.8) |
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 #3655B3 | 6.75:1 | AA | Lc -88.0 | Fine for body text |
| Black text on #3655B3 | 3.10:1 | AA large text | Lc 21.1 | Dividers and decoration only |
| #3655B3 text on white | 6.75:1 | AA | Lc 82.9 | Fine for body text |
| #3655B3 text on black | 3.10:1 | AA large text | Lc -19.0 | 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
#E3EAF9
oklch(93.6% 0.022 265.8)
-
Step 200
200
#CDD9F5
oklch(88.5% 0.041 267.1)
-
Step 300
300
#ABC0F2
oklch(80.9% 0.075 267)
-
Step 400
400
#7F9EEB
oklch(70.8% 0.119 266.7)
-
Step 500
500
#5F83E5
oklch(63% 0.153 266.8)
-
Step 600
600
#476BD3
oklch(55.7% 0.165 266.7)
-
Step 700
700 (this color)
#3655B3
oklch(48% 0.154 266.8)
-
Step 800
800
#2F4994
oklch(42.8% 0.127 266.6)
-
Step 900
900
#293E76
oklch(37.8% 0.099 266.3)
-
Step 950
950
#182445
oklch(26.9% 0.064 267)
#3655B3 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) | #1861B6 | 0.035 |
| Deuteranopia (no green cones) | #0056B1 | 0.033 |
| Tritanopia (no blue cones) | #006B7C | 0.123 |
| Achromatopsia (no color) | #5B5B5B | 0.154 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3655B3
#3655B3
oklch(48% 0.154 266.8)
- #765900
#765900
oklch(48.1% 0.098 86.5)
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 #3655B3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.056
- Denim Blue #3B5B92 ΔE 0.058
- Blue Blue #2242C7 ΔE 0.061
- Dusky Blue #475F94 ΔE 0.064
- Dusk Blue #26538D ΔE 0.065
- French Blue #436BAD ΔE 0.066
- Blueberry #464196 ΔE 0.066
- Iris #6258C4 ΔE 0.067
Use #3655B3 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.