#3F7573
Closest named color: Bluegreen (#017A79). oklch(52.5% 0.058 192.4), rgb(63, 117, 115).
Aa
White text reads best on this color (5.24:1).
About this color
#3F7573 is a medium-dark, muted teal or cyan. In OKLCH its lightness is 52%, its chroma 0.058 and its hue 192°. Its hue sits on the cool side of the wheel. The nearest named color is Bluegreen (#017A79), ΔE 0.032 away. White text reads best on it, at 5.24:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (52%) |
| Chroma | muted (0.058) |
| Temperature | cool |
| Nearest name | Bluegreen (#017A79) |
| Black text | 4.00:1 |
| White text | 5.24:1 |
Values
| HEX | #3F7573 |
| RGB | rgb(63, 117, 115) |
| HSL | hsl(178, 30%, 35%) |
| OKLCH | oklch(52.5% 0.058 192.4) |
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 #3F7573 | 5.24:1 | AA | Lc -81.3 | Fine for body text |
| Black text on #3F7573 | 4.00:1 | AA large text | Lc 28.1 | Dividers and decoration only |
| #3F7573 text on white | 5.24:1 | AA | Lc 75.9 | Fine for body text |
| #3F7573 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
#F3F6F6
oklch(97.1% 0.003 197.1)
-
Step 100
100
#E4EBEB
oklch(93.5% 0.007 197)
-
Step 200
200
#CFDCDB
oklch(88.4% 0.014 191.4)
-
Step 300
300
#AEC6C5
oklch(80.8% 0.026 193.6)
-
Step 400
400
#83A9A7
oklch(70.6% 0.041 192.2)
-
Step 500
500
#639492
oklch(63.1% 0.053 192.7)
-
Step 600
600 (this color)
#3F7573
oklch(52.5% 0.058 192.4)
-
Step 700
700
#396B69
oklch(49.2% 0.054 192.2)
-
Step 800
800
#305755
oklch(42.7% 0.045 191.4)
-
Step 900
900
#2B4846
oklch(37.8% 0.035 190.2)
-
Step 950
950
#1A2A29
oklch(27% 0.022 191)
#3F7573 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) | #6F7073 | 0.061 |
| Deuteranopia (no green cones) | #666974 | 0.058 |
| Tritanopia (no blue cones) | #257874 | 0.020 |
| Achromatopsia (no color) | #6C6C6C | 0.058 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F7573
#3F7573
oklch(52.5% 0.058 192.4)
- #885D61
#885D61
oklch(52.5% 0.057 13.1)
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 #3F7573, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Bluegreen #017A79 ΔE 0.032
- Deep Aqua #08787F ΔE 0.032
- Deep Turquoise #017374 ΔE 0.035
- Dark Aquamarine #017371 ΔE 0.036
- Teal #008080 ΔE 0.040
- Metallic Blue #4F738E ΔE 0.051
- Slate #516572 ΔE 0.051
- Ocean #017B92 ΔE 0.051
Use #3F7573 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.