#3F61CF
Closest named color: Warm Blue (#4B57DB). oklch(53% 0.174 267.2), rgb(63, 97, 207).
Aa
White text reads best on this color (5.49:1).
About this color
#3F61CF is a medium-dark, vivid blue. In OKLCH its lightness is 53%, its chroma 0.174 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is Warm Blue (#4B57DB), ΔE 0.032 away. White text reads best on it, at 5.49:1.
| Hue family | Blues |
| Lightness | medium-dark (53%) |
| Chroma | vivid (0.174) |
| Temperature | cool |
| Nearest name | Warm Blue (#4B57DB) |
| Black text | 3.82:1 |
| White text | 5.49:1 |
Values
| HEX | #3F61CF |
| RGB | rgb(63, 97, 207) |
| HSL | hsl(226, 60%, 53%) |
| OKLCH | oklch(53% 0.174 267.2) |
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 #3F61CF | 5.49:1 | AA | Lc -82.3 | Fine for body text |
| Black text on #3F61CF | 3.82:1 | AA large text | Lc 27.1 | Dividers and decoration only |
| #3F61CF text on white | 5.49:1 | AA | Lc 77.0 | Fine for body text |
| #3F61CF text on black | 3.82:1 | AA large text | Lc -24.7 | 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 600.
-
Step 50
50
#F2F5FD
oklch(97% 0.011 269.6)
-
Step 100
100
#E3EAFA
oklch(93.6% 0.023 266.9)
-
Step 200
200
#CCD9F7
oklch(88.5% 0.044 266.9)
-
Step 300
300
#AAC0F4
oklch(80.9% 0.078 266.8)
-
Step 400
400
#7E9DEF
oklch(70.7% 0.126 267.4)
-
Step 500
500
#5E82EA
oklch(63% 0.161 267.3)
-
Step 600
600 (this color)
#3F61CF
oklch(53% 0.174 267.2)
-
Step 700
700
#3857BB
oklch(49.1% 0.162 267.2)
-
Step 800
800
#2E4898
oklch(42.8% 0.135 267)
-
Step 900
900
#293D79
oklch(37.8% 0.105 267.4)
-
Step 950
950
#182447
oklch(27% 0.067 267.5)
#3F61CF 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) | #1170D3 | 0.043 |
| Deuteranopia (no green cones) | #0063CD | 0.036 |
| Tritanopia (no blue cones) | #007B8E | 0.141 |
| Achromatopsia (no color) | #696969 | 0.175 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F61CF
#3F61CF
oklch(53% 0.174 267.2)
- #866700
#866700
oklch(53% 0.108 87.8)
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 #3F61CF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Warm Blue #4B57DB ΔE 0.032
- Royal Blue #4169E1 ΔE 0.033
- Neon Blue #4361EE ΔE 0.048
- Iris #6258C4 ΔE 0.049
- Dark Periwinkle #665FD1 ΔE 0.050
- Azul #1D5DEC ΔE 0.053
- Mid Blue #276AB3 ΔE 0.056
- Slate Blue #6A5ACD ΔE 0.057
Use #3F61CF 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.