#3F61C7
Closest named color: Warm Blue (#4B57DB). oklch(52.4% 0.164 266.8), rgb(63, 97, 199).
Aa
White text reads best on this color (5.60:1).
About this color
#3F61C7 is a medium-dark, vivid blue. In OKLCH its lightness is 52%, its chroma 0.164 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is Warm Blue (#4B57DB), ΔE 0.041 away. White text reads best on it, at 5.60:1.
| Hue family | Blues |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.164) |
| Temperature | cool |
| Nearest name | Warm Blue (#4B57DB) |
| Black text | 3.74:1 |
| White text | 5.60:1 |
Values
| HEX | #3F61C7 |
| RGB | rgb(63, 97, 199) |
| HSL | hsl(225, 55%, 51%) |
| OKLCH | oklch(52.4% 0.164 266.8) |
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 #3F61C7 | 5.60:1 | AA | Lc -83.0 | Fine for body text |
| Black text on #3F61C7 | 3.74:1 | AA large text | Lc 26.4 | Dividers and decoration only |
| #3F61C7 text on white | 5.60:1 | AA | Lc 77.7 | Fine for body text |
| #3F61C7 text on black | 3.74:1 | AA large text | Lc -24.1 | 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
#E3EAF9
oklch(93.6% 0.022 265.8)
-
Step 200
200
#CDD9F5
oklch(88.5% 0.041 267.1)
-
Step 300
300
#ABC0F1
oklch(80.9% 0.073 266.7)
-
Step 400
400
#7F9EEA
oklch(70.7% 0.117 266.5)
-
Step 500
500
#6084E4
oklch(63.2% 0.15 266.7)
-
Step 600
600 (this color)
#3F61C7
oklch(52.4% 0.164 266.8)
-
Step 700
700
#3959B6
oklch(49.2% 0.152 266.5)
-
Step 800
800
#2F4993
oklch(42.7% 0.126 266.5)
-
Step 900
900
#2A3E75
oklch(37.8% 0.097 266.7)
-
Step 950
950
#192545
oklch(27.2% 0.062 266.8)
#3F61C7 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) | #226ECB | 0.036 |
| Deuteranopia (no green cones) | #0062C5 | 0.037 |
| Tritanopia (no blue cones) | #00798B | 0.133 |
| Achromatopsia (no color) | #686868 | 0.164 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F61C7
#3F61C7
oklch(52.4% 0.164 266.8)
- #856500
#856500
oklch(52.5% 0.107 86.8)
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 #3F61C7, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Warm Blue #4B57DB ΔE 0.041
- Royal Blue #4169E1 ΔE 0.044
- Mid Blue #276AB3 ΔE 0.046
- Iris #6258C4 ΔE 0.047
- French Blue #436BAD ΔE 0.053
- Dark Periwinkle #665FD1 ΔE 0.053
- Slate Blue #6A5ACD ΔE 0.059
- Neon Blue #4361EE ΔE 0.060
Use #3F61C7 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.