#3F5CAB
Closest named color: Mid Blue (#276AB3). oklch(49.4% 0.131 266.5), rgb(63, 92, 171).
Aa
White text reads best on this color (6.30:1).
About this color
#3F5CAB is a medium-dark, moderately saturated blue. In OKLCH its lightness is 49%, its chroma 0.131 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.040 away. White text reads best on it, at 6.30:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | moderately saturated (0.131) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 3.33:1 |
| White text | 6.30:1 |
Values
| HEX | #3F5CAB |
| RGB | rgb(63, 92, 171) |
| HSL | hsl(224, 46%, 46%) |
| OKLCH | oklch(49.4% 0.131 266.5) |
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 #3F5CAB | 6.30:1 | AA | Lc -86.3 | Fine for body text |
| Black text on #3F5CAB | 3.33:1 | AA large text | Lc 22.9 | Dividers and decoration only |
| #3F5CAB text on white | 6.30:1 | AA | Lc 81.1 | Fine for body text |
| #3F5CAB text on black | 3.33:1 | AA large text | Lc -20.7 | 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
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E4EAF7
oklch(93.6% 0.019 266)
-
Step 200
200
#CED9F1
oklch(88.4% 0.035 266)
-
Step 300
300
#AEC0EA
oklch(80.8% 0.063 266.8)
-
Step 400
400
#849FE0
oklch(70.8% 0.1 266.6)
-
Step 500
500
#6586D8
oklch(63.2% 0.129 266.2)
-
Step 600
600
#4D6EC5
oklch(55.7% 0.14 266.3)
-
Step 700
700 (this color)
#3F5CAB
oklch(49.4% 0.131 266.5)
-
Step 800
800
#334B8A
oklch(42.7% 0.108 266.2)
-
Step 900
900
#2D3F6E
oklch(37.7% 0.084 266.6)
-
Step 950
950
#1A2541
oklch(27% 0.055 266.6)
#3F5CAB 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) | #3665AE | 0.025 |
| Deuteranopia (no green cones) | #245BA9 | 0.027 |
| Tritanopia (no blue cones) | #006E7B | 0.111 |
| Achromatopsia (no color) | #606060 | 0.131 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F5CAB
#3F5CAB
oklch(49.4% 0.131 266.5)
- #7A5C00
#7A5C00
oklch(49.2% 0.101 86.4)
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 #3F5CAB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.040
- Dusky Blue #475F94 ΔE 0.041
- Denim Blue #3B5B92 ΔE 0.041
- French Blue #436BAD ΔE 0.042
- Twilight #4E518B ΔE 0.056
- Denim #3B638C ΔE 0.058
- Light Navy Blue #2E5A88 ΔE 0.061
- Dusk Blue #26538D ΔE 0.061
Use #3F5CAB 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.