#638F83
Closest named color: Dusty Teal (#4C9085). oklch(61.4% 0.052 175.7), rgb(99, 143, 131).
Aa
Black text reads best on this color (5.78:1).
About this color
#638F83 is a medium-dark, muted teal or cyan. In OKLCH its lightness is 61%, its chroma 0.052 and its hue 176°. Its hue sits on the cool side of the wheel. The nearest named color is Dusty Teal (#4C9085), ΔE 0.023 away. Black text reads best on it, at 5.78:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (61%) |
| Chroma | muted (0.052) |
| Temperature | cool |
| Nearest name | Dusty Teal (#4C9085) |
| Black text | 5.78:1 |
| White text | 3.62:1 |
Values
| HEX | #638F83 |
| RGB | rgb(99, 143, 131) |
| HSL | hsl(164, 18%, 47%) |
| OKLCH | oklch(61.4% 0.052 175.7) |
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 #638F83 | 3.62:1 | AA large text | Lc -69.3 | Content text, not long reading |
| Black text on #638F83 | 5.78:1 | AA | Lc 40.2 | Non-text elements, placeholder text |
| #638F83 text on white | 3.62:1 | AA large text | Lc 63.8 | Content text, not long reading |
| #638F83 text on black | 5.78:1 | AA | Lc -37.8 | Non-text elements, placeholder text |
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 500.
-
Step 50
50
#F3F6F5
oklch(97.1% 0.003 174.5)
-
Step 100
100
#E5EBE9
oklch(93.5% 0.007 174.4)
-
Step 200
200
#D0DCD9
oklch(88.5% 0.014 179.4)
-
Step 300
300
#B1C6C0
oklch(80.9% 0.024 176.7)
-
Step 400
400
#87A99F
oklch(70.6% 0.04 175.3)
-
Step 500
500 (this color)
#638F83
oklch(61.4% 0.052 175.7)
-
Step 600
600
#4E7E72
oklch(55.5% 0.056 176.5)
-
Step 700
700
#3F6B5F
oklch(49.2% 0.053 174.7)
-
Step 800
800
#34574E
oklch(42.7% 0.044 176)
-
Step 900
900
#2E4841
oklch(37.8% 0.034 175.7)
-
Step 950
950
#1B2A26
oklch(27% 0.022 176.2)
#638F83 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) | #8C8A82 | 0.054 |
| Deuteranopia (no green cones) | #848484 | 0.052 |
| Tritanopia (no blue cones) | #57908B | 0.016 |
| Achromatopsia (no color) | #868686 | 0.052 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #638F83
#638F83
oklch(61.4% 0.052 175.7)
- #9F7886
#9F7886
oklch(61.5% 0.052 355.4)
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 #638F83, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusty Teal #4C9085 ΔE 0.023
- Slate Green #658D6D ΔE 0.031
- Grey Teal #5E9B8A ΔE 0.033
- Green Grey #77926F ΔE 0.039
- Sea #3C9992 ΔE 0.041
- Dull Teal #5F9E8F ΔE 0.042
- Steel Grey #6F828A ΔE 0.045
- Cadet Blue #5F9EA0 ΔE 0.051
Use #638F83 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.