#3F97AA
Closest named color: Sea (#3C9992). oklch(63.1% 0.088 214.3), rgb(63, 151, 170).
Aa
Black text reads best on this color (6.21:1).
About this color
#3F97AA is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 63%, its chroma 0.088 and its hue 214°. Its hue sits on the cool side of the wheel. The nearest named color is Sea (#3C9992), ΔE 0.040 away. Black text reads best on it, at 6.21:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (63%) |
| Chroma | moderately saturated (0.088) |
| Temperature | cool |
| Nearest name | Sea (#3C9992) |
| Black text | 6.21:1 |
| White text | 3.37:1 |
Values
| HEX | #3F97AA |
| RGB | rgb(63, 151, 170) |
| HSL | hsl(191, 46%, 46%) |
| OKLCH | oklch(63.1% 0.088 214.3) |
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 #3F97AA | 3.37:1 | AA large text | Lc -66.5 | Content text, not long reading |
| Black text on #3F97AA | 6.21:1 | AA | Lc 43.1 | Non-text elements, placeholder text |
| #3F97AA text on white | 3.37:1 | AA large text | Lc 61.0 | Content text, not long reading |
| #3F97AA text on black | 6.21:1 | AA | Lc -40.7 | 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
#F1F6F8
oklch(97% 0.006 223.5)
-
Step 100
100
#E1ECEF
oklch(93.6% 0.012 215.8)
-
Step 200
200
#C8DEE3
oklch(88.6% 0.024 212.9)
-
Step 300
300
#A2C8D2
oklch(80.9% 0.043 215.5)
-
Step 400
400
#6DACBB
oklch(70.7% 0.068 214.5)
-
Step 500
500 (this color)
#3F97AA
oklch(63.1% 0.088 214.3)
-
Step 600
600
#0E8195
oklch(55.6% 0.095 214)
-
Step 700
700
#006D7F
oklch(49.2% 0.087 214.3)
-
Step 800
800
#065968
oklch(42.8% 0.074 214.7)
-
Step 900
900
#144954
oklch(37.6% 0.057 214.4)
-
Step 950
950
#0E2B31
oklch(27% 0.036 213.3)
#3F97AA 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) | #8992AB | 0.079 |
| Deuteranopia (no green cones) | #7A87AA | 0.072 |
| Tritanopia (no blue cones) | #009E9D | 0.040 |
| Achromatopsia (no color) | #8C8C8C | 0.088 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F97AA
#3F97AA
oklch(63.1% 0.088 214.3)
- #B87666
#B87666
oklch(63.1% 0.087 34.3)
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 #3F97AA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sea #3C9992 ΔE 0.040
- Cadet Blue #5F9EA0 ΔE 0.041
- Teal Green #0A9396 ΔE 0.042
- Blue NCS #118AB2 ΔE 0.052
- Persian Green #2A9D8F ΔE 0.053
- Dusty Teal #4C9085 ΔE 0.053
- Dusty Blue #5A86AD ΔE 0.054
- Blue Green #0F9B8E ΔE 0.055
Use #3F97AA 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.