#3F87A4
Closest named color: Blue NCS (#118AB2). oklch(58.9% 0.084 227.2), rgb(63, 135, 164).
Aa
Black text reads best on this color (5.21:1).
About this color
#3F87A4 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 59%, its chroma 0.084 and its hue 227°. Its hue sits on the cool side of the wheel. The nearest named color is Blue NCS (#118AB2), ΔE 0.028 away. Black text reads best on it, at 5.21:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (59%) |
| Chroma | moderately saturated (0.084) |
| Temperature | cool |
| Nearest name | Blue NCS (#118AB2) |
| Black text | 5.21:1 |
| White text | 4.02:1 |
Values
| HEX | #3F87A4 |
| RGB | rgb(63, 135, 164) |
| HSL | hsl(197, 44%, 45%) |
| OKLCH | oklch(58.9% 0.084 227.2) |
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 #3F87A4 | 4.02:1 | AA large text | Lc -72.8 | Content text, not long reading |
| Black text on #3F87A4 | 5.21:1 | AA | Lc 36.7 | Non-text elements, placeholder text |
| #3F87A4 text on white | 4.02:1 | AA large text | Lc 67.3 | Content text, not long reading |
| #3F87A4 text on black | 5.21:1 | AA | Lc -34.3 | 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 600.
-
Step 50
50
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E3EBF0
oklch(93.5% 0.011 234.8)
-
Step 200
200
#CBDCE4
oklch(88.4% 0.021 227.6)
-
Step 300
300
#A8C6D4
oklch(80.9% 0.038 227.7)
-
Step 400
400
#78A9BE
oklch(70.8% 0.06 226.5)
-
Step 500
500
#5393AE
oklch(63.1% 0.077 227.3)
-
Step 600
600 (this color)
#3F87A4
oklch(58.9% 0.084 227.2)
-
Step 700
700
#266983
oklch(49% 0.078 227.5)
-
Step 800
800
#21566B
oklch(42.7% 0.065 227.5)
-
Step 900
900
#214756
oklch(37.7% 0.05 226.3)
-
Step 950
950
#142A33
oklch(27.1% 0.033 226.5)
#3F87A4 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) | #7885A5 | 0.063 |
| Deuteranopia (no green cones) | #697AA4 | 0.055 |
| Tritanopia (no blue cones) | #008F90 | 0.053 |
| Achromatopsia (no color) | #7F7F7F | 0.084 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F87A4
#3F87A4
oklch(58.9% 0.084 227.2)
- #A66D51
#A66D51
oklch(58.9% 0.084 46.8)
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 #3F87A4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue NCS #118AB2 ΔE 0.028
- Teal Blue #01889F ΔE 0.029
- Off Blue #5684AE ΔE 0.030
- Dusty Blue #5A86AD ΔE 0.031
- Steel Blue #4682B4 ΔE 0.033
- Cerulean #457B9D ΔE 0.034
- Stormy Blue #507B9C ΔE 0.035
- Cool Blue #4984B8 ΔE 0.037
Use #3F87A4 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.