#3F67C1
Closest named color: Mid Blue (#276AB3). oklch(53.2% 0.148 264), rgb(63, 103, 193).
Aa
White text reads best on this color (5.35:1).
About this color
#3F67C1 is a medium-dark, vivid blue. In OKLCH its lightness is 53%, its chroma 0.148 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.032 away. White text reads best on it, at 5.35:1.
| Hue family | Blues |
| Lightness | medium-dark (53%) |
| Chroma | vivid (0.148) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 3.92:1 |
| White text | 5.35:1 |
Values
| HEX | #3F67C1 |
| RGB | rgb(63, 103, 193) |
| HSL | hsl(222, 51%, 50%) |
| OKLCH | oklch(53.2% 0.148 264) |
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 #3F67C1 | 5.35:1 | AA | Lc -81.7 | Fine for body text |
| Black text on #3F67C1 | 3.92:1 | AA large text | Lc 27.7 | Dividers and decoration only |
| #3F67C1 text on white | 5.35:1 | AA | Lc 76.4 | Fine for body text |
| #3F67C1 text on black | 3.92:1 | AA large text | Lc -25.4 | 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 600.
-
Step 50
50
#F2F5FC
oklch(97% 0.01 267.4)
-
Step 100
100
#E3EAF7
oklch(93.6% 0.019 263)
-
Step 200
200
#CDDAF2
oklch(88.6% 0.036 262.8)
-
Step 300
300
#ABC1ED
oklch(80.9% 0.067 264.1)
-
Step 400
400
#7FA0E3
oklch(70.8% 0.105 263.8)
-
Step 500
500
#5F86DB
oklch(63% 0.136 264.3)
-
Step 600
600 (this color)
#3F67C1
oklch(53.2% 0.148 264)
-
Step 700
700
#375CAE
oklch(49.2% 0.138 263.8)
-
Step 800
800
#2E4B8D
oklch(42.6% 0.115 264.3)
-
Step 900
900
#293F70
oklch(37.6% 0.089 264.3)
-
Step 950
950
#182542
oklch(26.9% 0.057 264.6)
#3F67C1 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) | #3971C4 | 0.026 |
| Deuteranopia (no green cones) | #1F65BF | 0.027 |
| Tritanopia (no blue cones) | #007C8A | 0.122 |
| Achromatopsia (no color) | #6B6B6B | 0.148 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F67C1
#3F67C1
oklch(53.2% 0.148 264)
- #8A6600
#8A6600
oklch(53.3% 0.109 84.2)
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 #3F67C1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.032
- French Blue #436BAD ΔE 0.035
- Windows Blue #3778BF ΔE 0.047
- Royal Blue #4169E1 ΔE 0.049
- Iris #6258C4 ΔE 0.055
- Flat Blue #3C73A8 ΔE 0.057
- Dark Periwinkle #665FD1 ΔE 0.058
- Warm Blue #4B57DB ΔE 0.059
Use #3F67C1 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.