#638488
Closest named color: Steel Grey (#6F828A). oklch(59% 0.038 205.4), rgb(99, 132, 136).
Aa
Black text reads best on this color (5.18:1).
About this color
#638488 is a medium-dark, muted teal or cyan. In OKLCH its lightness is 59%, its chroma 0.038 and its hue 205°. Its hue sits on the cool side of the wheel. The nearest named color is Steel Grey (#6F828A), ΔE 0.017 away. Black text reads best on it, at 5.18:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (59%) |
| Chroma | muted (0.038) |
| Temperature | cool |
| Nearest name | Steel Grey (#6F828A) |
| Black text | 5.18:1 |
| White text | 4.04:1 |
Values
| HEX | #638488 |
| RGB | rgb(99, 132, 136) |
| HSL | hsl(186, 16%, 46%) |
| OKLCH | oklch(59% 0.038 205.4) |
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 #638488 | 4.04:1 | AA large text | Lc -73.2 | Content text, not long reading |
| Black text on #638488 | 5.18:1 | AA | Lc 36.4 | Non-text elements, placeholder text |
| #638488 text on white | 4.04:1 | AA large text | Lc 67.7 | Content text, not long reading |
| #638488 text on black | 5.18:1 | AA | Lc -34.0 | 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
#F4F6F6
oklch(97.2% 0.002 197.1)
-
Step 100
100
#E6EBEB
oklch(93.6% 0.005 197.1)
-
Step 200
200
#D2DBDC
oklch(88.5% 0.01 204.9)
-
Step 300
300
#B5C4C6
oklch(80.9% 0.017 206.4)
-
Step 400
400
#8EA6A9
oklch(70.8% 0.027 205.8)
-
Step 500
500
#719094
oklch(63.1% 0.035 206)
-
Step 600
600 (this color)
#638488
oklch(59% 0.038 205.4)
-
Step 700
700
#49676A
oklch(49.2% 0.035 203.8)
-
Step 800
800
#3C5457
oklch(42.8% 0.03 205.7)
-
Step 900
900
#344547
oklch(37.7% 0.022 205.2)
-
Step 950
950
#1E292A
oklch(27.1% 0.015 203.2)
#638488 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) | #7F8188 | 0.038 |
| Deuteranopia (no green cones) | #787C88 | 0.035 |
| Tritanopia (no blue cones) | #578785 | 0.018 |
| Achromatopsia (no color) | #7E7E7E | 0.038 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #638488
#638488
oklch(59% 0.038 205.4)
- #937572
#937572
oklch(59% 0.038 24.9)
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 #638488, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Steel Grey #6F828A ΔE 0.017
- Battleship Grey #6B7C85 ΔE 0.024
- Grey Blue #647D8E ΔE 0.025
- Slate Gray #708090 ΔE 0.026
- Steel #738595 ΔE 0.030
- Medium Grey #7D7F7C ΔE 0.037
- Gray #808080 ΔE 0.039
- Light Slate Gray #778899 ΔE 0.039
Use #638488 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.