#3F91C2
Closest named color: Faded Blue (#658CBB). oklch(62.7% 0.108 238.2), rgb(63, 145, 194).
Aa
Black text reads best on this color (6.04:1).
About this color
#3F91C2 is a medium-light, moderately saturated blue. In OKLCH its lightness is 63%, its chroma 0.108 and its hue 238°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.036 away. Black text reads best on it, at 6.04:1.
| Hue family | Blues |
| Lightness | medium-light (63%) |
| Chroma | moderately saturated (0.108) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 6.04:1 |
| White text | 3.47:1 |
Values
| HEX | #3F91C2 |
| RGB | rgb(63, 145, 194) |
| HSL | hsl(202, 52%, 50%) |
| OKLCH | oklch(62.7% 0.108 238.2) |
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 #3F91C2 | 3.47:1 | AA large text | Lc -67.5 | Content text, not long reading |
| Black text on #3F91C2 | 6.04:1 | AA | Lc 42.0 | Non-text elements, placeholder text |
| #3F91C2 text on white | 3.47:1 | AA large text | Lc 62.1 | Content text, not long reading |
| #3F91C2 text on black | 6.04:1 | AA | Lc -39.6 | Non-text elements, placeholder text |
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 500.
-
Step 50
50
#F1F6FA
oklch(97.1% 0.008 241.7)
-
Step 100
100
#E1ECF3
oklch(93.7% 0.015 235.4)
-
Step 200
200
#C8DCEB
oklch(88.4% 0.03 240.2)
-
Step 300
300
#A2C6DF
oklch(80.9% 0.052 238.6)
-
Step 400
400
#6CA8D0
oklch(70.6% 0.086 238.8)
-
Step 500
500 (this color)
#3F91C2
oklch(62.7% 0.108 238.2)
-
Step 600
600
#157CB0
oklch(55.7% 0.118 238.1)
-
Step 700
700
#006897
oklch(49.1% 0.109 238.1)
-
Step 800
800
#0A557A
oklch(42.7% 0.09 237.7)
-
Step 900
900
#154663
oklch(37.6% 0.071 239.1)
-
Step 950
950
#0E293A
oklch(26.9% 0.046 239.3)
#3F91C2 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) | #7A91C4 | 0.061 |
| Deuteranopia (no green cones) | #6884C1 | 0.050 |
| Tritanopia (no blue cones) | #009DA2 | 0.073 |
| Achromatopsia (no color) | #898989 | 0.108 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F91C2
#3F91C2
oklch(62.7% 0.108 238.2)
- #B97741
#B97741
oklch(62.8% 0.108 58.2)
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 #3F91C2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.036
- Cool Blue #4984B8 ΔE 0.036
- Blue NCS #118AB2 ΔE 0.040
- Dusty Blue #5A86AD ΔE 0.041
- Off Blue #5684AE ΔE 0.042
- Steel Blue #4682B4 ΔE 0.043
- Water Blue #0E87CC ΔE 0.044
- Dark Sky Blue #448EE4 ΔE 0.055
Use #3F91C2 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.