#3F5DC0
Closest named color: Mid Blue (#276AB3). oklch(51% 0.159 267.7), rgb(63, 93, 192).
Aa
White text reads best on this color (5.93:1).
About this color
#3F5DC0 is a medium-dark, vivid blue. In OKLCH its lightness is 51%, its chroma 0.159 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.045 away. White text reads best on it, at 5.93:1.
| Hue family | Blues |
| Lightness | medium-dark (51%) |
| Chroma | vivid (0.159) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 3.53:1 |
| White text | 5.93:1 |
Values
| HEX | #3F5DC0 |
| RGB | rgb(63, 93, 192) |
| HSL | hsl(226, 51%, 50%) |
| OKLCH | oklch(51% 0.159 267.7) |
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 #3F5DC0 | 5.93:1 | AA | Lc -84.6 | Fine for body text |
| Black text on #3F5DC0 | 3.53:1 | AA large text | Lc 24.7 | Dividers and decoration only |
| #3F5DC0 text on white | 5.93:1 | AA | Lc 79.3 | Fine for body text |
| #3F5DC0 text on black | 3.53:1 | AA large text | Lc -22.5 | 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
#F2F5FD
oklch(97% 0.011 269.6)
-
Step 100
100
#E3EAF9
oklch(93.6% 0.022 265.8)
-
Step 200
200
#CDD9F6
oklch(88.5% 0.042 267.7)
-
Step 300
300
#ABC0F3
oklch(81% 0.076 267.3)
-
Step 400
400
#7F9DEE
oklch(70.7% 0.124 267.7)
-
Step 500
500
#6082E8
oklch(63% 0.158 267.8)
-
Step 600
600
#4869D6
oklch(55.5% 0.171 267.8)
-
Step 700
700 (this color)
#3F5DC0
oklch(51% 0.159 267.7)
-
Step 800
800
#304896
oklch(42.8% 0.131 267.7)
-
Step 900
900
#2A3D77
oklch(37.7% 0.102 267.7)
-
Step 950
950
#192446
oklch(27% 0.065 268.3)
#3F5DC0 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) | #206AC4 | 0.038 |
| Deuteranopia (no green cones) | #005EBE | 0.039 |
| Tritanopia (no blue cones) | #007485 | 0.131 |
| Achromatopsia (no color) | #646464 | 0.159 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F5DC0
#3F5DC0
oklch(51% 0.159 267.7)
- #7F6200
#7F6200
oklch(51.1% 0.104 88.3)
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 #3F5DC0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.045
- Warm Blue #4B57DB ΔE 0.047
- Iris #6258C4 ΔE 0.047
- French Blue #436BAD ΔE 0.053
- Royal Blue #4169E1 ΔE 0.058
- Dark Periwinkle #665FD1 ΔE 0.059
- Slate Blue #6A5ACD ΔE 0.062
- Light Indigo #6D5ACF ΔE 0.068
Use #3F5DC0 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.