#638680
Closest named color: Steel Grey (#6F828A). oklch(59.2% 0.04 183.2), rgb(99, 134, 128).
Aa
Black text reads best on this color (5.25:1).
About this color
#638680 is a medium-dark, muted teal or cyan. In OKLCH its lightness is 59%, its chroma 0.040 and its hue 183°. Its hue sits on the cool side of the wheel. The nearest named color is Steel Grey (#6F828A), ΔE 0.028 away. Black text reads best on it, at 5.25:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (59%) |
| Chroma | muted (0.040) |
| Temperature | cool |
| Nearest name | Steel Grey (#6F828A) |
| Black text | 5.25:1 |
| White text | 3.99:1 |
Values
| HEX | #638680 |
| RGB | rgb(99, 134, 128) |
| HSL | hsl(170, 15%, 46%) |
| OKLCH | oklch(59.2% 0.04 183.2) |
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 #638680 | 3.99:1 | AA large text | Lc -72.8 | Content text, not long reading |
| Black text on #638680 | 5.25:1 | AA | Lc 36.8 | Non-text elements, placeholder text |
| #638680 text on white | 3.99:1 | AA large text | Lc 67.3 | Content text, not long reading |
| #638680 text on black | 5.25:1 | AA | Lc -34.4 | 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 600.
-
Step 50
50
#F4F6F5
oklch(97.1% 0.002 165.1)
-
Step 100
100
#E6EBEA
oklch(93.6% 0.006 183)
-
Step 200
200
#D2DBDA
oklch(88.4% 0.01 189)
-
Step 300
300
#B4C5C2
oklch(81% 0.019 184.1)
-
Step 400
400
#8DA7A2
oklch(70.7% 0.03 182.5)
-
Step 500
500
#71918C
oklch(63.1% 0.037 184.6)
-
Step 600
600 (this color)
#638680
oklch(59.2% 0.04 183.2)
-
Step 700
700
#496863
oklch(49.2% 0.037 183.7)
-
Step 800
800
#3C5551
oklch(42.8% 0.031 183.9)
-
Step 900
900
#334643
oklch(37.7% 0.025 184.3)
-
Step 950
950
#1E2927
oklch(27% 0.016 182.8)
#638680 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) | #838280 | 0.044 |
| Deuteranopia (no green cones) | #7C7D81 | 0.041 |
| Tritanopia (no blue cones) | #598784 | 0.012 |
| Achromatopsia (no color) | #7F7F7F | 0.041 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #638680
#638680
oklch(59.2% 0.04 183.2)
- #93747B
#93747B
oklch(59.1% 0.04 3.3)
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 #638680, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Steel Grey #6F828A ΔE 0.028
- Dusty Teal #4C9085 ΔE 0.034
- Battleship Grey #6B7C85 ΔE 0.034
- Medium Grey #7D7F7C ΔE 0.037
- Slate Gray #708090 ΔE 0.039
- Grey Blue #647D8E ΔE 0.040
- Slate Green #658D6D ΔE 0.041
- Gray #808080 ΔE 0.041
Use #638680 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.