#66939D
Closest named color: Blue Grey (#758DA3). oklch(63.4% 0.051 213), rgb(102, 147, 157).
Aa
Black text reads best on this color (6.22:1).
About this color
#66939D is a medium-light, muted teal or cyan. In OKLCH its lightness is 63%, its chroma 0.051 and its hue 213°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Grey (#758DA3), ΔE 0.028 away. Black text reads best on it, at 6.22:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (63%) |
| Chroma | muted (0.051) |
| Temperature | cool |
| Nearest name | Blue Grey (#758DA3) |
| Black text | 6.22:1 |
| White text | 3.37:1 |
Values
| HEX | #66939D |
| RGB | rgb(102, 147, 157) |
| HSL | hsl(191, 22%, 51%) |
| OKLCH | oklch(63.4% 0.051 213) |
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 #66939D | 3.37:1 | AA large text | Lc -66.6 | Content text, not long reading |
| Black text on #66939D | 6.22:1 | AA | Lc 42.9 | Non-text elements, placeholder text |
| #66939D text on white | 3.37:1 | AA large text | Lc 61.1 | Content text, not long reading |
| #66939D text on black | 6.22:1 | AA | Lc -40.6 | 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
#F3F6F7
oklch(97.1% 0.003 219.5)
-
Step 100
100
#E5EBED
oklch(93.6% 0.007 219.6)
-
Step 200
200
#CFDCDF
oklch(88.6% 0.015 213.1)
-
Step 300
300
#AFC5CA
oklch(80.8% 0.025 212.9)
-
Step 400
400
#85A8B0
oklch(70.8% 0.04 213.2)
-
Step 500
500 (this color)
#66939D
oklch(63.4% 0.051 213)
-
Step 600
600
#4B7C87
oklch(55.6% 0.056 213.6)
-
Step 700
700
#3C6972
oklch(49.2% 0.052 211.9)
-
Step 800
800
#32555D
oklch(42.6% 0.043 213.9)
-
Step 900
900
#2C464C
oklch(37.6% 0.033 213.8)
-
Step 950
950
#1A292D
oklch(26.9% 0.022 216.2)
#66939D 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) | #8B909E | 0.047 |
| Deuteranopia (no green cones) | #82899D | 0.043 |
| Tritanopia (no blue cones) | #529796 | 0.027 |
| Achromatopsia (no color) | #8C8C8C | 0.051 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66939D
#66939D
oklch(63.4% 0.051 213)
- #A78077
#A78077
oklch(63.5% 0.05 33.3)
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 #66939D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Grey #758DA3 ΔE 0.028
- Cadet Blue #5F9EA0 ΔE 0.031
- Light Slate Gray #778899 ΔE 0.034
- Silver Lake Blue #778DA9 ΔE 0.036
- Steel #738595 ΔE 0.040
- Grey Teal #5E9B8A ΔE 0.044
- Dull Teal #5F9E8F ΔE 0.045
- Sea #3C9992 ΔE 0.047
Use #66939D 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.