#3F7175
Closest named color: Deep Aqua (#08787F). oklch(51.5% 0.054 202.3), rgb(63, 113, 117).
Aa
White text reads best on this color (5.48:1).
About this color
#3F7175 is a medium-dark, muted teal or cyan. In OKLCH its lightness is 52%, its chroma 0.054 and its hue 202°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Aqua (#08787F), ΔE 0.034 away. White text reads best on it, at 5.48:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (52%) |
| Chroma | muted (0.054) |
| Temperature | cool |
| Nearest name | Deep Aqua (#08787F) |
| Black text | 3.83:1 |
| White text | 5.48:1 |
Values
| HEX | #3F7175 |
| RGB | rgb(63, 113, 117) |
| HSL | hsl(184, 30%, 35%) |
| OKLCH | oklch(51.5% 0.054 202.3) |
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 #3F7175 | 5.48:1 | AA | Lc -82.6 | Fine for body text |
| Black text on #3F7175 | 3.83:1 | AA large text | Lc 26.8 | Dividers and decoration only |
| #3F7175 text on white | 5.48:1 | AA | Lc 77.3 | Fine for body text |
| #3F7175 text on black | 3.83:1 | AA large text | Lc -24.5 | 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 700.
-
Step 50
50
#F3F6F6
oklch(97.1% 0.003 197.1)
-
Step 100
100
#E4EBEC
oklch(93.5% 0.008 207.1)
-
Step 200
200
#CFDCDD
oklch(88.5% 0.014 202.4)
-
Step 300
300
#AEC6C8
oklch(80.9% 0.026 202.8)
-
Step 400
400
#82A9AC
oklch(70.7% 0.042 202.1)
-
Step 500
500
#629397
oklch(63% 0.053 202.4)
-
Step 600
600
#477E82
oklch(55.7% 0.059 201.7)
-
Step 700
700 (this color)
#3F7175
oklch(51.5% 0.054 202.3)
-
Step 800
800
#2F565A
oklch(42.6% 0.045 204.1)
-
Step 900
900
#2A474A
oklch(37.6% 0.035 204.1)
-
Step 950
950
#192A2B
oklch(27.1% 0.023 200.6)
#3F7175 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) | #6A6D75 | 0.054 |
| Deuteranopia (no green cones) | #616675 | 0.051 |
| Tritanopia (no blue cones) | #247472 | 0.024 |
| Achromatopsia (no color) | #696969 | 0.055 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F7175
#3F7175
oklch(51.5% 0.054 202.3)
- #845B59
#845B59
oklch(51.4% 0.054 22.3)
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 #3F7175, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Aqua #08787F ΔE 0.034
- Deep Turquoise #017374 ΔE 0.034
- Dark Aquamarine #017371 ΔE 0.036
- Bluegreen #017A79 ΔE 0.038
- Slate #516572 ΔE 0.039
- Metallic Blue #4F738E ΔE 0.045
- Teal #008080 ΔE 0.048
- Dark Aqua #05696B ΔE 0.049
Use #3F7175 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.