#3F97CA
Closest named color: Faded Blue (#658CBB). oklch(64.5% 0.113 237.7), rgb(63, 151, 202).
Aa
Black text reads best on this color (6.49:1).
About this color
#3F97CA is a medium-light, moderately saturated blue. In OKLCH its lightness is 65%, its chroma 0.113 and its hue 238°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.043 away. Black text reads best on it, at 6.49:1.
| Hue family | Blues |
| Lightness | medium-light (65%) |
| Chroma | moderately saturated (0.113) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 6.49:1 |
| White text | 3.23:1 |
Values
| HEX | #3F97CA |
| RGB | rgb(63, 151, 202) |
| HSL | hsl(202, 57%, 52%) |
| OKLCH | oklch(64.5% 0.113 237.7) |
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 #3F97CA | 3.23:1 | AA large text | Lc -64.8 | Content text, not long reading |
| Black text on #3F97CA | 6.49:1 | AA | Lc 44.7 | Non-text elements, placeholder text |
| #3F97CA text on white | 3.23:1 | AA large text | Lc 59.3 | Large or bold text, headings |
| #3F97CA text on black | 6.49:1 | AA | Lc -42.4 | 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
#E0ECF3
oklch(93.6% 0.016 233)
-
Step 200
200
#C7DDEB
oklch(88.6% 0.03 235.7)
-
Step 300
300
#A0C7E0
oklch(81% 0.055 236.5)
-
Step 400
400
#69A9D1
oklch(70.7% 0.088 237.3)
-
Step 500
500 (this color)
#3F97CA
oklch(64.5% 0.113 237.7)
-
Step 600
600
#007CB2
oklch(55.6% 0.123 237.7)
-
Step 700
700
#006896
oklch(49.1% 0.108 237.6)
-
Step 800
800
#00557C
oklch(42.7% 0.094 237.9)
-
Step 900
900
#114764
oklch(37.8% 0.073 237.4)
-
Step 950
950
#0C293A
oklch(26.8% 0.047 237.9)
#3F97CA 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) | #7F97CC | 0.064 |
| Deuteranopia (no green cones) | #6C89C9 | 0.053 |
| Tritanopia (no blue cones) | #00A4A8 | 0.077 |
| Achromatopsia (no color) | #8F8F8F | 0.113 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F97CA
#3F97CA
oklch(64.5% 0.113 237.7)
- #C17B43
#C17B43
oklch(64.6% 0.113 57.5)
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 #3F97CA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.043
- Dark Sky Blue #448EE4 ΔE 0.052
- Cool Blue #4984B8 ΔE 0.054
- Water Blue #0E87CC ΔE 0.055
- Blue NCS #118AB2 ΔE 0.056
- Dusty Blue #5A86AD ΔE 0.057
- Chefchaouen Blue #4895EF ΔE 0.059
- Off Blue #5684AE ΔE 0.059
Use #3F97CA 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.