#3F747C
Closest named color: Deep Aqua (#08787F). oklch(52.5% 0.058 208.1), rgb(63, 116, 124).
Aa
White text reads best on this color (5.24:1).
About this color
#3F747C is a medium-dark, muted teal or cyan. In OKLCH its lightness is 53%, its chroma 0.058 and its hue 208°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Aqua (#08787F), ΔE 0.031 away. White text reads best on it, at 5.24:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (53%) |
| Chroma | muted (0.058) |
| Temperature | cool |
| Nearest name | Deep Aqua (#08787F) |
| Black text | 4.00:1 |
| White text | 5.24:1 |
Values
| HEX | #3F747C |
| RGB | rgb(63, 116, 124) |
| HSL | hsl(188, 33%, 37%) |
| OKLCH | oklch(52.5% 0.058 208.1) |
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 #3F747C | 5.24:1 | AA | Lc -81.3 | Fine for body text |
| Black text on #3F747C | 4.00:1 | AA large text | Lc 28.1 | Dividers and decoration only |
| #3F747C text on white | 5.24:1 | AA | Lc 75.9 | Fine for body text |
| #3F747C text on black | 4.00:1 | AA large text | Lc -25.8 | 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
#E4EBEC
oklch(93.5% 0.008 207.1)
-
Step 200
200
#CFDCDE
oklch(88.5% 0.014 207.9)
-
Step 300
300
#AEC6C9
oklch(80.9% 0.026 205.8)
-
Step 400
400
#83A8AE
oklch(70.6% 0.041 208.5)
-
Step 500
500
#62939A
oklch(63.1% 0.054 207.2)
-
Step 600
600 (this color)
#3F747C
oklch(52.5% 0.058 208.1)
-
Step 700
700
#396971
oklch(49% 0.054 209.4)
-
Step 800
800
#30565C
oklch(42.7% 0.044 208.6)
-
Step 900
900
#2B474B
oklch(37.7% 0.034 207.2)
-
Step 950
950
#192A2C
oklch(27.1% 0.023 205.2)
#3F747C 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) | #6C707D | 0.056 |
| Deuteranopia (no green cones) | #62697C | 0.051 |
| Tritanopia (no blue cones) | #1E7876 | 0.030 |
| Achromatopsia (no color) | #6C6C6C | 0.058 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F747C
#3F747C
oklch(52.5% 0.058 208.1)
- #895E58
#895E58
oklch(52.6% 0.058 28)
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 #3F747C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Aqua #08787F ΔE 0.031
- Metallic Blue #4F738E ΔE 0.036
- Bluegreen #017A79 ΔE 0.036
- Deep Turquoise #017374 ΔE 0.038
- Dark Aquamarine #017371 ΔE 0.041
- Ocean #017B92 ΔE 0.041
- Teal #008080 ΔE 0.043
- Slate #516572 ΔE 0.045
Use #3F747C 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.