#3A5BB1
Closest named color: Mid Blue (#276AB3). oklch(49.3% 0.142 265.7), rgb(58, 91, 177).
Aa
White text reads best on this color (6.34:1).
About this color
#3A5BB1 is a medium-dark, vivid blue. In OKLCH its lightness is 49%, its chroma 0.142 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 6.34:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.142) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 3.31:1 |
| White text | 6.34:1 |
Values
| HEX | #3A5BB1 |
| RGB | rgb(58, 91, 177) |
| HSL | hsl(223, 51%, 46%) |
| OKLCH | oklch(49.3% 0.142 265.7) |
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 #3A5BB1 | 6.34:1 | AA | Lc -86.4 | Fine for body text |
| Black text on #3A5BB1 | 3.31:1 | AA large text | Lc 22.8 | Dividers and decoration only |
| #3A5BB1 text on white | 6.34:1 | AA | Lc 81.2 | Fine for body text |
| #3A5BB1 text on black | 3.31:1 | AA large text | Lc -20.6 | 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
#CDD9F3
oklch(88.4% 0.038 265.8)
-
Step 300
300
#ACC0EE
oklch(80.9% 0.069 266.5)
-
Step 400
400
#809FE6
oklch(70.8% 0.11 265.7)
-
Step 500
500
#6085DE
oklch(63% 0.141 265.5)
-
Step 600
600
#486DCC
oklch(55.6% 0.153 265.7)
-
Step 700
700 (this color)
#3A5BB1
oklch(49.3% 0.142 265.7)
-
Step 800
800
#304A8F
oklch(42.7% 0.118 266)
-
Step 900
900
#2A3F72
oklch(37.8% 0.091 265.4)
-
Step 950
950
#192543
oklch(27% 0.058 266.1)
#3A5BB1 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) | #2D65B4 | 0.027 |
| Deuteranopia (no green cones) | #105AAF | 0.032 |
| Tritanopia (no blue cones) | #006F7D | 0.118 |
| Achromatopsia (no color) | #5F5F5F | 0.142 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3A5BB1
#3A5BB1
oklch(49.3% 0.142 265.7)
- #7B5C00
#7B5C00
oklch(49.3% 0.101 85.6)
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 #3A5BB1, 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 0.048
- Denim Blue #3B5B92 ΔE 0.050
- Dusky Blue #475F94 ΔE 0.052
- Iris #6258C4 ΔE 0.062
- Twilight #4E518B ΔE 0.065
- Dusk Blue #26538D ΔE 0.065
- Denim #3B638C ΔE 0.068
Use #3A5BB1 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.