#638D83
Closest named color: Dusty Teal (#4C9085). oklch(61% 0.049 178.1), rgb(99, 141, 131).
Aa
Black text reads best on this color (5.66:1).
About this color
#638D83 is a medium-dark, muted teal or cyan. In OKLCH its lightness is 61%, its chroma 0.049 and its hue 178°. Its hue sits on the cool side of the wheel. The nearest named color is Dusty Teal (#4C9085), ΔE 0.024 away. Black text reads best on it, at 5.66:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (61%) |
| Chroma | muted (0.049) |
| Temperature | cool |
| Nearest name | Dusty Teal (#4C9085) |
| Black text | 5.66:1 |
| White text | 3.70:1 |
Values
| HEX | #638D83 |
| RGB | rgb(99, 141, 131) |
| HSL | hsl(166, 18%, 47%) |
| OKLCH | oklch(61% 0.049 178.1) |
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 #638D83 | 3.70:1 | AA large text | Lc -70.1 | Content text, not long reading |
| Black text on #638D83 | 5.66:1 | AA | Lc 39.5 | Non-text elements, placeholder text |
| #638D83 text on white | 3.70:1 | AA large text | Lc 64.6 | Content text, not long reading |
| #638D83 text on black | 5.66:1 | AA | Lc -37.1 | 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
#E5EBEA
oklch(93.5% 0.007 185.3)
-
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
#88A9A0
oklch(70.7% 0.039 176.7)
-
Step 500
500 (this color)
#638D83
oklch(61% 0.049 178.1)
-
Step 600
600
#507E73
oklch(55.6% 0.054 177.4)
-
Step 700
700
#416A61
oklch(49.1% 0.049 178.7)
-
Step 800
800
#36574F
oklch(42.9% 0.041 177.2)
-
Step 900
900
#2F4742
oklch(37.6% 0.031 180.1)
-
Step 950
950
#1C2A26
oklch(27.1% 0.02 175.1)
#638D83 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) | #8A8883 | 0.052 |
| Deuteranopia (no green cones) | #828284 | 0.050 |
| Tritanopia (no blue cones) | #578E8A | 0.015 |
| Achromatopsia (no color) | #858585 | 0.049 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #638D83
#638D83
oklch(61% 0.049 178.1)
- #9C7783
#9C7783
oklch(60.9% 0.049 357.4)
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 #638D83, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusty Teal #4C9085 ΔE 0.024
- Slate Green #658D6D ΔE 0.032
- Grey Teal #5E9B8A ΔE 0.039
- Steel Grey #6F828A ΔE 0.040
- Green Grey #77926F ΔE 0.043
- Sea #3C9992 ΔE 0.044
- Steel #738595 ΔE 0.047
- Dull Teal #5F9E8F ΔE 0.047
Use #638D83 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.