#638D92
Closest named color: Steel (#738595). oklch(61.5% 0.047 205.3), rgb(99, 141, 146).
Aa
Black text reads best on this color (5.75:1).
About this color
#638D92 is a medium-dark, muted teal or cyan. In OKLCH its lightness is 61%, its chroma 0.047 and its hue 205°. Its hue sits on the cool side of the wheel. The nearest named color is Steel (#738595), ΔE 0.031 away. Black text reads best on it, at 5.75:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (61%) |
| Chroma | muted (0.047) |
| Temperature | cool |
| Nearest name | Steel (#738595) |
| Black text | 5.75:1 |
| White text | 3.64:1 |
Values
| HEX | #638D92 |
| RGB | rgb(99, 141, 146) |
| HSL | hsl(186, 19%, 48%) |
| OKLCH | oklch(61.5% 0.047 205.3) |
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 #638D92 | 3.64:1 | AA large text | Lc -69.5 | Content text, not long reading |
| Black text on #638D92 | 5.75:1 | AA | Lc 40.0 | Non-text elements, placeholder text |
| #638D92 text on white | 3.64:1 | AA large text | Lc 64.0 | Content text, not long reading |
| #638D92 text on black | 5.75:1 | AA | Lc -37.6 | 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
#E5EBEC
oklch(93.6% 0.007 208.8)
-
Step 200
200
#D0DCDD
oklch(88.6% 0.013 202.9)
-
Step 300
300
#B0C5C8
oklch(80.8% 0.023 207.1)
-
Step 400
400
#87A8AB
oklch(70.8% 0.036 203.2)
-
Step 500
500 (this color)
#638D92
oklch(61.5% 0.047 205.3)
-
Step 600
600
#4E7C82
oklch(55.6% 0.051 206.3)
-
Step 700
700
#3F696E
oklch(49.2% 0.047 205.4)
-
Step 800
800
#345559
oklch(42.6% 0.039 205.5)
-
Step 900
900
#2E4649
oklch(37.6% 0.03 205.8)
-
Step 950
950
#1B292B
oklch(26.9% 0.019 207.1)
#638D92 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) | #878A92 | 0.047 |
| Deuteranopia (no green cones) | #7E8392 | 0.043 |
| Tritanopia (no blue cones) | #52908E | 0.022 |
| Achromatopsia (no color) | #868686 | 0.047 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #638D92
#638D92
oklch(61.5% 0.047 205.3)
- #9F7A76
#9F7A76
oklch(61.4% 0.047 25.6)
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 #638D92, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Steel #738595 ΔE 0.031
- Steel Grey #6F828A ΔE 0.032
- Light Slate Gray #778899 ΔE 0.032
- Dusty Teal #4C9085 ΔE 0.035
- Blue Grey #758DA3 ΔE 0.036
- Slate Gray #708090 ΔE 0.039
- Silver Lake Blue #778DA9 ΔE 0.046
- Grey Blue #647D8E ΔE 0.046
Use #638D92 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.