#3F7A8A
Closest named color: Metallic Blue (#4F738E). oklch(54.6% 0.066 217.6), rgb(63, 122, 138).
Aa
White text reads best on this color (4.81:1).
About this color
#3F7A8A is a medium-dark, muted teal or cyan. In OKLCH its lightness is 55%, its chroma 0.066 and its hue 218°. Its hue sits on the cool side of the wheel. The nearest named color is Metallic Blue (#4F738E), ΔE 0.028 away. White text reads best on it, at 4.81:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (55%) |
| Chroma | muted (0.066) |
| Temperature | cool |
| Nearest name | Metallic Blue (#4F738E) |
| Black text | 4.36:1 |
| White text | 4.81:1 |
Values
| HEX | #3F7A8A |
| RGB | rgb(63, 122, 138) |
| HSL | hsl(193, 37%, 39%) |
| OKLCH | oklch(54.6% 0.066 217.6) |
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 #3F7A8A | 4.81:1 | AA | Lc -78.7 | Fine for body text |
| Black text on #3F7A8A | 4.36:1 | AA large text | Lc 30.8 | Non-text elements, placeholder text |
| #3F7A8A text on white | 4.81:1 | AA | Lc 73.3 | Content text, not long reading |
| #3F7A8A text on black | 4.36:1 | AA large text | Lc -28.4 | 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
#ACC6CD
oklch(80.9% 0.03 215.8)
-
Step 400
400
#7FA8B4
oklch(70.6% 0.048 217.7)
-
Step 500
500
#5D93A2
oklch(63.1% 0.061 217.3)
-
Step 600
600 (this color)
#3F7A8A
oklch(54.6% 0.066 217.6)
-
Step 700
700
#336978
oklch(49% 0.062 218.3)
-
Step 800
800
#2B5661
oklch(42.7% 0.051 216.5)
-
Step 900
900
#284750
oklch(37.8% 0.04 218.4)
-
Step 950
950
#182A2F
oklch(27.2% 0.025 217.2)
#3F7A8A 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) | #6F778B | 0.057 |
| Deuteranopia (no green cones) | #646E8A | 0.053 |
| Tritanopia (no blue cones) | #07807F | 0.041 |
| Achromatopsia (no color) | #727272 | 0.066 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F7A8A
#3F7A8A
oklch(54.6% 0.066 217.6)
- #926354
#926354
oklch(54.6% 0.066 38.4)
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 #3F7A8A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Metallic Blue #4F738E ΔE 0.028
- Ocean #017B92 ΔE 0.031
- Cerulean #457B9D ΔE 0.031
- Stormy Blue #507B9C ΔE 0.035
- Dull Blue #49759C ΔE 0.038
- Deep Aqua #08787F ΔE 0.038
- Teal #008080 ΔE 0.041
- Sea Blue #047495 ΔE 0.043
Use #3F7A8A 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.