#3755B0
Closest named color: Denim Blue (#3B5B92). oklch(47.8% 0.149 266.9), rgb(55, 85, 176).
Aa
White text reads best on this color (6.79:1).
About this color
#3755B0 is a medium-dark, vivid blue. In OKLCH its lightness is 48%, its chroma 0.149 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is Denim Blue (#3B5B92), ΔE 0.054 away. White text reads best on it, at 6.79:1.
| Hue family | Blues |
| Lightness | medium-dark (48%) |
| Chroma | vivid (0.149) |
| Temperature | cool |
| Nearest name | Denim Blue (#3B5B92) |
| Black text | 3.08:1 |
| White text | 6.79:1 |
Values
| HEX | #3755B0 |
| RGB | rgb(55, 85, 176) |
| HSL | hsl(225, 52%, 45%) |
| OKLCH | oklch(47.8% 0.149 266.9) |
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 #3755B0 | 6.79:1 | AA | Lc -88.1 | Fine for body text |
| Black text on #3755B0 | 3.08:1 | AA large text | Lc 20.9 | Dividers and decoration only |
| #3755B0 text on white | 6.79:1 | AA | Lc 83.1 | Fine for body text |
| #3755B0 text on black | 3.08:1 | 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
#F2F5FC
oklch(97% 0.01 267.4)
-
Step 100
100
#E3EAF8
oklch(93.6% 0.02 264.5)
-
Step 200
200
#CDD9F5
oklch(88.5% 0.041 267.1)
-
Step 300
300
#ACC0F0
oklch(80.9% 0.072 267.1)
-
Step 400
400
#809EE9
oklch(70.7% 0.115 266.8)
-
Step 500
500
#6184E2
oklch(63.1% 0.147 266.8)
-
Step 600
600
#496BD0
oklch(55.6% 0.16 267.1)
-
Step 700
700 (this color)
#3755B0
oklch(47.8% 0.149 266.9)
-
Step 800
800
#304992
oklch(42.7% 0.124 266.9)
-
Step 900
900
#2A3E74
oklch(37.7% 0.096 266.6)
-
Step 950
950
#192544
oklch(27.1% 0.06 266.5)
#3755B0 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) | #1D61B3 | 0.034 |
| Deuteranopia (no green cones) | #0056AE | 0.034 |
| Tritanopia (no blue cones) | #006B7A | 0.123 |
| Achromatopsia (no color) | #5B5B5B | 0.149 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3755B0
#3755B0
oklch(47.8% 0.149 266.9)
- #755800
#755800
oklch(47.7% 0.098 86.3)
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 #3755B0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Denim Blue #3B5B92 ΔE 0.054
- Mid Blue #276AB3 ΔE 0.056
- Dusky Blue #475F94 ΔE 0.060
- Dusk Blue #26538D ΔE 0.060
- Blueberry #464196 ΔE 0.063
- Twilight #4E518B ΔE 0.064
- Blue Blue #2242C7 ΔE 0.065
- French Blue #436BAD ΔE 0.065
Use #3755B0 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.