#668F99
Closest named color: Blue Grey (#758DA3). oklch(62.4% 0.047 214.5), rgb(102, 143, 153).
Aa
Black text reads best on this color (5.95:1).
About this color
#668F99 is a medium-light, muted teal or cyan. In OKLCH its lightness is 62%, its chroma 0.047 and its hue 215°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Grey (#758DA3), ΔE 0.027 away. Black text reads best on it, at 5.95:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (62%) |
| Chroma | muted (0.047) |
| Temperature | cool |
| Nearest name | Blue Grey (#758DA3) |
| Black text | 5.95:1 |
| White text | 3.52:1 |
Values
| HEX | #668F99 |
| RGB | rgb(102, 143, 153) |
| HSL | hsl(192, 20%, 50%) |
| OKLCH | oklch(62.4% 0.047 214.5) |
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 #668F99 | 3.52:1 | AA large text | Lc -68.3 | Content text, not long reading |
| Black text on #668F99 | 5.95:1 | AA | Lc 41.3 | Non-text elements, placeholder text |
| #668F99 text on white | 3.52:1 | AA large text | Lc 62.8 | Content text, not long reading |
| #668F99 text on black | 5.95:1 | AA | Lc -38.9 | 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
#D0DBDE
oklch(88.4% 0.013 215.8)
-
Step 300
300
#B1C5CA
oklch(81% 0.023 214.4)
-
Step 400
400
#87A7AF
oklch(70.7% 0.037 214.6)
-
Step 500
500 (this color)
#668F99
oklch(62.4% 0.047 214.5)
-
Step 600
600
#4F7B86
oklch(55.5% 0.051 215.3)
-
Step 700
700
#3F6872
oklch(49.1% 0.049 215)
-
Step 800
800
#35555C
oklch(42.8% 0.039 213)
-
Step 900
900
#2E464C
oklch(37.7% 0.031 215.1)
-
Step 950
950
#1B292C
oklch(27% 0.02 212.4)
#668F99 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) | #878C9A | 0.043 |
| Deuteranopia (no green cones) | #7F8699 | 0.039 |
| Tritanopia (no blue cones) | #549392 | 0.027 |
| Achromatopsia (no color) | #888888 | 0.048 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #668F99
#668F99
oklch(62.4% 0.047 214.5)
- #A27D74
#A27D74
oklch(62.3% 0.048 34)
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 #668F99, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Grey #758DA3 ΔE 0.027
- Light Slate Gray #778899 ΔE 0.028
- Steel #738595 ΔE 0.030
- Silver Lake Blue #778DA9 ΔE 0.036
- Steel Grey #6F828A ΔE 0.037
- Cadet Blue #5F9EA0 ΔE 0.041
- Slate Gray #708090 ΔE 0.042
- Dusty Teal #4C9085 ΔE 0.044
Use #668F99 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.