#3756B4
Closest named color: Mid Blue (#276AB3). oklch(48.3% 0.154 266.8), rgb(55, 86, 180).
Aa
White text reads best on this color (6.66:1).
About this color
#3756B4 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 0.054 away. White text reads best on it, at 6.66:1.
| Hue family | Blues |
| Lightness | medium-dark (48%) |
| Chroma | vivid (0.154) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 3.15:1 |
| White text | 6.66:1 |
Values
| HEX | #3756B4 |
| RGB | rgb(55, 86, 180) |
| HSL | hsl(225, 53%, 46%) |
| OKLCH | oklch(48.3% 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 #3756B4 | 6.66:1 | AA | Lc -87.6 | Fine for body text |
| Black text on #3756B4 | 3.15:1 | AA large text | Lc 21.5 | Dividers and decoration only |
| #3756B4 text on white | 6.66:1 | AA | Lc 82.5 | Fine for body text |
| #3756B4 text on black | 3.15:1 | AA large text | Lc -19.4 | 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
#6083E5
oklch(63.1% 0.153 267.2)
-
Step 600
600
#476BD3
oklch(55.7% 0.165 266.7)
-
Step 700
700 (this color)
#3756B4
oklch(48.3% 0.154 266.8)
-
Step 800
800
#2F4994
oklch(42.8% 0.127 266.6)
-
Step 900
900
#2A3E76
oklch(37.8% 0.099 266.9)
-
Step 950
950
#182445
oklch(26.9% 0.064 267)
#3756B4 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) | #1A62B7 | 0.035 |
| Deuteranopia (no green cones) | #0057B2 | 0.033 |
| Tritanopia (no blue cones) | #006C7C | 0.125 |
| Achromatopsia (no color) | #5C5C5C | 0.154 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3756B4
#3756B4
oklch(48.3% 0.154 266.8)
- #775A00
#775A00
oklch(48.4% 0.099 86.7)
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 #3756B4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.054
- Denim Blue #3B5B92 ΔE 0.059
- Blue Blue #2242C7 ΔE 0.063
- French Blue #436BAD ΔE 0.063
- Dusky Blue #475F94 ΔE 0.064
- Iris #6258C4 ΔE 0.064
- Warm Blue #4B57DB ΔE 0.066
- Dusk Blue #26538D ΔE 0.067
Use #3756B4 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.