#66939F
Closest named color: Blue Grey (#758DA3). oklch(63.5% 0.052 216.2), rgb(102, 147, 159).
Aa
Black text reads best on this color (6.23:1).
About this color
#66939F is a medium-light, muted teal or cyan. In OKLCH its lightness is 64%, its chroma 0.052 and its hue 216°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Grey (#758DA3), ΔE 0.026 away. Black text reads best on it, at 6.23:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (64%) |
| Chroma | muted (0.052) |
| Temperature | cool |
| Nearest name | Blue Grey (#758DA3) |
| Black text | 6.23:1 |
| White text | 3.36:1 |
Values
| HEX | #66939F |
| RGB | rgb(102, 147, 159) |
| HSL | hsl(193, 23%, 51%) |
| OKLCH | oklch(63.5% 0.052 216.2) |
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 #66939F | 3.36:1 | AA large text | Lc -66.5 | Content text, not long reading |
| Black text on #66939F | 6.23:1 | AA | Lc 43.0 | Non-text elements, placeholder text |
| #66939F text on white | 3.36:1 | AA large text | Lc 61.1 | Content text, not long reading |
| #66939F text on black | 6.23:1 | 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
#AFC5CB
oklch(80.9% 0.025 215.9)
-
Step 400
400
#84A7B1
oklch(70.6% 0.041 217.1)
-
Step 500
500 (this color)
#66939F
oklch(63.5% 0.052 216.2)
-
Step 600
600
#4B7C89
oklch(55.7% 0.057 216.6)
-
Step 700
700
#3C6874
oklch(49% 0.052 217.2)
-
Step 800
800
#32555E
oklch(42.7% 0.043 216)
-
Step 900
900
#2C464D
oklch(37.6% 0.034 216.5)
-
Step 950
950
#1A292D
oklch(26.9% 0.022 216.2)
#66939F 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) | #8B90A0 | 0.047 |
| Deuteranopia (no green cones) | #81899F | 0.042 |
| Tritanopia (no blue cones) | #519897 | 0.030 |
| Achromatopsia (no color) | #8C8C8C | 0.052 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66939F
#66939F
oklch(63.5% 0.052 216.2)
- #A88075
#A88075
oklch(63.6% 0.053 35.9)
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 #66939F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Grey #758DA3 ΔE 0.026
- Cadet Blue #5F9EA0 ΔE 0.032
- Silver Lake Blue #778DA9 ΔE 0.033
- Light Slate Gray #778899 ΔE 0.034
- Steel #738595 ΔE 0.039
- Grey Teal #5E9B8A ΔE 0.047
- Dull Teal #5F9E8F ΔE 0.047
- Sea #3C9992 ΔE 0.049
Use #66939F 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.