#638780
Closest named color: Steel Grey (#6F828A). oklch(59.4% 0.042 181.5), rgb(99, 135, 128).
Aa
Black text reads best on this color (5.30:1).
About this color
#638780 is a medium-dark, muted teal or cyan. In OKLCH its lightness is 59%, its chroma 0.042 and its hue 181°. Its hue sits on the cool side of the wheel. The nearest named color is Steel Grey (#6F828A), ΔE 0.029 away. Black text reads best on it, at 5.30:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (59%) |
| Chroma | muted (0.042) |
| Temperature | cool |
| Nearest name | Steel Grey (#6F828A) |
| Black text | 5.30:1 |
| White text | 3.95:1 |
Values
| HEX | #638780 |
| RGB | rgb(99, 135, 128) |
| HSL | hsl(168, 15%, 46%) |
| OKLCH | oklch(59.4% 0.042 181.5) |
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 #638780 | 3.95:1 | AA large text | Lc -72.4 | Content text, not long reading |
| Black text on #638780 | 5.30:1 | AA | Lc 37.2 | Non-text elements, placeholder text |
| #638780 text on white | 3.95:1 | AA large text | Lc 66.9 | Content text, not long reading |
| #638780 text on black | 5.30:1 | AA | Lc -34.8 | 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
#E6EBEA
oklch(93.6% 0.006 183)
-
Step 200
200
#D1DCD9
oklch(88.5% 0.013 178)
-
Step 300
300
#B3C5C1
oklch(80.9% 0.02 181)
-
Step 400
400
#8BA8A2
oklch(70.8% 0.033 181.4)
-
Step 500
500 (this color)
#638780
oklch(59.4% 0.042 181.5)
-
Step 600
600
#557C75
oklch(55.5% 0.045 182.2)
-
Step 700
700
#456962
oklch(49.1% 0.043 180.9)
-
Step 800
800
#395550
oklch(42.6% 0.035 182.3)
-
Step 900
900
#314642
oklch(37.5% 0.027 181.7)
-
Step 950
950
#1D2927
oklch(26.9% 0.017 183.7)
#638780 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) | #848380 | 0.045 |
| Deuteranopia (no green cones) | #7D7E81 | 0.042 |
| Tritanopia (no blue cones) | #598885 | 0.012 |
| Achromatopsia (no color) | #808080 | 0.042 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #638780
#638780
oklch(59.4% 0.042 181.5)
- #95747D
#95747D
oklch(59.4% 0.043 0.4)
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 #638780, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Steel Grey #6F828A ΔE 0.029
- Dusty Teal #4C9085 ΔE 0.032
- Battleship Grey #6B7C85 ΔE 0.037
- Slate Green #658D6D ΔE 0.038
- Medium Grey #7D7F7C ΔE 0.038
- Slate Gray #708090 ΔE 0.041
- Steel #738595 ΔE 0.042
- Gray #808080 ΔE 0.042
Use #638780 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.