#3F7888
Closest named color: Metallic Blue (#4F738E). oklch(54% 0.065 218.3), rgb(63, 120, 136).
Aa
White text reads best on this color (4.93:1).
About this color
#3F7888 is a medium-dark, muted teal or cyan. In OKLCH its lightness is 54%, its chroma 0.065 and its hue 218°. Its hue sits on the cool side of the wheel. The nearest named color is Metallic Blue (#4F738E), ΔE 0.026 away. White text reads best on it, at 4.93:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (54%) |
| Chroma | muted (0.065) |
| Temperature | cool |
| Nearest name | Metallic Blue (#4F738E) |
| Black text | 4.25:1 |
| White text | 4.93:1 |
Values
| HEX | #3F7888 |
| RGB | rgb(63, 120, 136) |
| HSL | hsl(193, 37%, 39%) |
| OKLCH | oklch(54% 0.065 218.3) |
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 #3F7888 | 4.93:1 | AA | Lc -79.5 | Fine for body text |
| Black text on #3F7888 | 4.25:1 | AA large text | Lc 30.0 | Non-text elements, placeholder text |
| #3F7888 text on white | 4.93:1 | AA | Lc 74.0 | Content text, not long reading |
| #3F7888 text on black | 4.25:1 | AA large text | Lc -27.7 | 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
#F3F6F7
oklch(97.1% 0.003 219.5)
-
Step 100
100
#E4EBEE
oklch(93.6% 0.009 225.1)
-
Step 200
200
#CEDCE0
oklch(88.5% 0.016 216.7)
-
Step 300
300
#ADC6CD
oklch(81% 0.029 216.5)
-
Step 400
400
#80A8B4
oklch(70.7% 0.047 218.2)
-
Step 500
500
#5F93A2
oklch(63.2% 0.06 218)
-
Step 600
600 (this color)
#3F7888
oklch(54% 0.065 218.3)
-
Step 700
700
#356978
oklch(49.1% 0.06 218.9)
-
Step 800
800
#2D5661
oklch(42.8% 0.049 217.2)
-
Step 900
900
#29474F
oklch(37.8% 0.038 216.7)
-
Step 950
950
#18292E
oklch(26.8% 0.024 218.3)
#3F7888 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) | #6E7589 | 0.056 |
| Deuteranopia (no green cones) | #636D88 | 0.050 |
| Tritanopia (no blue cones) | #0D7E7D | 0.041 |
| Achromatopsia (no color) | #707070 | 0.065 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F7888
#3F7888
oklch(54% 0.065 218.3)
- #906253
#906253
oklch(54.1% 0.065 38.8)
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 #3F7888, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Metallic Blue #4F738E ΔE 0.026
- Ocean #017B92 ΔE 0.031
- Cerulean #457B9D ΔE 0.034
- Deep Aqua #08787F ΔE 0.036
- Stormy Blue #507B9C ΔE 0.038
- Dull Blue #49759C ΔE 0.038
- Sea Blue #047495 ΔE 0.041
- Teal #008080 ΔE 0.042
Use #3F7888 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.