#3B5BB3
Closest named color: Mid Blue (#276AB3). oklch(49.5% 0.145 266.2), rgb(59, 91, 179).
Aa
White text reads best on this color (6.30:1).
About this color
#3B5BB3 is a medium-dark, vivid blue. In OKLCH its lightness is 49%, its chroma 0.145 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.041 away. White text reads best on it, at 6.30:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.145) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 3.33:1 |
| White text | 6.30:1 |
Values
| HEX | #3B5BB3 |
| RGB | rgb(59, 91, 179) |
| HSL | hsl(224, 50%, 47%) |
| OKLCH | oklch(49.5% 0.145 266.2) |
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 #3B5BB3 | 6.30:1 | AA | Lc -86.2 | Fine for body text |
| Black text on #3B5BB3 | 3.33:1 | AA large text | Lc 23.0 | Dividers and decoration only |
| #3B5BB3 text on white | 6.30:1 | AA | Lc 81.1 | Fine for body text |
| #3B5BB3 text on black | 3.33:1 | AA large text | Lc -20.8 | 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
#CDD9F4
oklch(88.5% 0.039 266.5)
-
Step 300
300
#ACC0EF
oklch(80.9% 0.07 266.8)
-
Step 400
400
#809EE7
oklch(70.6% 0.113 266.5)
-
Step 500
500
#6185E0
oklch(63.2% 0.143 266.1)
-
Step 600
600
#486CCD
oklch(55.5% 0.155 266.2)
-
Step 700
700 (this color)
#3B5BB3
oklch(49.5% 0.145 266.2)
-
Step 800
800
#304A90
oklch(42.7% 0.12 266.1)
-
Step 900
900
#2A3E73
oklch(37.6% 0.094 266.4)
-
Step 950
950
#192543
oklch(27% 0.058 266.1)
#3B5BB3 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) | #2B66B6 | 0.030 |
| Deuteranopia (no green cones) | #0B5BB1 | 0.034 |
| Tritanopia (no blue cones) | #006F7E | 0.119 |
| Achromatopsia (no color) | #606060 | 0.145 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3B5BB3
#3B5BB3
oklch(49.5% 0.145 266.2)
- #7B5D00
#7B5D00
oklch(49.5% 0.101 86.6)
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 #3B5BB3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.041
- French Blue #436BAD ΔE 0.049
- Denim Blue #3B5B92 ΔE 0.053
- Dusky Blue #475F94 ΔE 0.055
- Iris #6258C4 ΔE 0.059
- Warm Blue #4B57DB ΔE 0.067
- Twilight #4E518B ΔE 0.068
- Dusk Blue #26538D ΔE 0.069
Use #3B5BB3 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.