#638E8A
Closest named color: Dusty Teal (#4C9085). oklch(61.4% 0.048 188.7), rgb(99, 142, 138).
Aa
Black text reads best on this color (5.76:1).
About this color
#638E8A is a medium-dark, muted teal or cyan. In OKLCH its lightness is 61%, its chroma 0.048 and its hue 189°. Its hue sits on the cool side of the wheel. The nearest named color is Dusty Teal (#4C9085), ΔE 0.027 away. Black text reads best on it, at 5.76:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (61%) |
| Chroma | muted (0.048) |
| Temperature | cool |
| Nearest name | Dusty Teal (#4C9085) |
| Black text | 5.76:1 |
| White text | 3.64:1 |
Values
| HEX | #638E8A |
| RGB | rgb(99, 142, 138) |
| HSL | hsl(174, 18%, 47%) |
| OKLCH | oklch(61.4% 0.048 188.7) |
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 #638E8A | 3.64:1 | AA large text | Lc -69.5 | Content text, not long reading |
| Black text on #638E8A | 5.76:1 | AA | Lc 40.1 | Non-text elements, placeholder text |
| #638E8A text on white | 3.64:1 | AA large text | Lc 64.0 | Content text, not long reading |
| #638E8A text on black | 5.76:1 | AA | Lc -37.7 | 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
#F3F6F6
oklch(97.1% 0.003 197.1)
-
Step 100
100
#E5EBEB
oklch(93.6% 0.006 197)
-
Step 200
200
#D0DCDB
oklch(88.5% 0.013 190.9)
-
Step 300
300
#B1C6C3
oklch(81% 0.023 186.4)
-
Step 400
400
#87A8A5
oklch(70.6% 0.036 189.5)
-
Step 500
500 (this color)
#638E8A
oklch(61.4% 0.048 188.7)
-
Step 600
600
#4E7D79
oklch(55.5% 0.052 188.9)
-
Step 700
700
#3F6A66
oklch(49.2% 0.048 188.2)
-
Step 800
800
#345653
oklch(42.6% 0.04 188.7)
-
Step 900
900
#2E4745
oklch(37.7% 0.031 189.6)
-
Step 950
950
#1B2A28
oklch(27.1% 0.021 185.7)
#638E8A 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) | #898A8A | 0.050 |
| Deuteranopia (no green cones) | #81848B | 0.047 |
| Tritanopia (no blue cones) | #55908D | 0.015 |
| Achromatopsia (no color) | #868686 | 0.048 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #638E8A
#638E8A
oklch(61.4% 0.048 188.7)
- #9F797E
#9F797E
oklch(61.5% 0.048 9.8)
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 #638E8A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusty Teal #4C9085 ΔE 0.027
- Steel Grey #6F828A ΔE 0.037
- Grey Teal #5E9B8A ΔE 0.038
- Steel #738595 ΔE 0.041
- Sea #3C9992 ΔE 0.042
- Slate Green #658D6D ΔE 0.042
- Light Slate Gray #778899 ΔE 0.042
- Dull Teal #5F9E8F ΔE 0.045
Use #638E8A 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.