#406E75
Closest named color: Slate (#516572). oklch(50.8% 0.052 208.1), rgb(64, 110, 117).
Aa
White text reads best on this color (5.66:1).
About this color
#406E75 is a medium-dark, muted teal or cyan. In OKLCH its lightness is 51%, its chroma 0.052 and its hue 208°. Its hue sits on the cool side of the wheel. The nearest named color is Slate (#516572), ΔE 0.031 away. White text reads best on it, at 5.66:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (51%) |
| Chroma | muted (0.052) |
| Temperature | cool |
| Nearest name | Slate (#516572) |
| Black text | 3.70:1 |
| White text | 5.66:1 |
Values
| HEX | #406E75 |
| RGB | rgb(64, 110, 117) |
| HSL | hsl(188, 29%, 35%) |
| OKLCH | oklch(50.8% 0.052 208.1) |
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 #406E75 | 5.66:1 | AA | Lc -83.5 | Fine for body text |
| Black text on #406E75 | 3.70:1 | AA large text | Lc 25.8 | Dividers and decoration only |
| #406E75 text on white | 5.66:1 | AA | Lc 78.3 | Fine for body text |
| #406E75 text on black | 3.70:1 | AA large text | Lc -23.5 | 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
#E5EBEC
oklch(93.6% 0.007 208.8)
-
Step 200
200
#CFDCDE
oklch(88.5% 0.014 207.9)
-
Step 300
300
#AFC5C9
oklch(80.8% 0.025 209.8)
-
Step 400
400
#84A8AE
oklch(70.7% 0.04 208.8)
-
Step 500
500
#64929A
oklch(63% 0.051 209.5)
-
Step 600
600
#4A7D84
oklch(55.7% 0.056 206.9)
-
Step 700
700 (this color)
#406E75
oklch(50.8% 0.052 208.1)
-
Step 800
800
#31565B
oklch(42.8% 0.043 206.7)
-
Step 900
900
#2C474B
oklch(37.8% 0.033 207.6)
-
Step 950
950
#1A292C
oklch(26.9% 0.021 211.4)
#406E75 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) | #676B75 | 0.050 |
| Deuteranopia (no green cones) | #5E6475 | 0.046 |
| Tritanopia (no blue cones) | #277270 | 0.027 |
| Achromatopsia (no color) | #676767 | 0.052 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #406E75
#406E75
oklch(50.8% 0.052 208.1)
- #815A55
#815A55
oklch(50.8% 0.053 27.2)
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 #406E75, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate #516572 ΔE 0.031
- Deep Turquoise #017374 ΔE 0.037
- Deep Aqua #08787F ΔE 0.039
- Dark Aquamarine #017371 ΔE 0.039
- Bluegreen #017A79 ΔE 0.045
- Metallic Blue #4F738E ΔE 0.045
- Dark Aqua #05696B ΔE 0.046
- Dim Gray #696969 ΔE 0.053
Use #406E75 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.