#668E93
Closest named color: Light Slate Gray (#778899). oklch(61.9% 0.045 205.7), rgb(102, 142, 147).
Aa
Black text reads best on this color (5.85:1).
About this color
#668E93 is a medium-dark, muted teal or cyan. In OKLCH its lightness is 62%, its chroma 0.045 and its hue 206°. Its hue sits on the cool side of the wheel. The nearest named color is Light Slate Gray (#778899), ΔE 0.030 away. Black text reads best on it, at 5.85:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (62%) |
| Chroma | muted (0.045) |
| Temperature | cool |
| Nearest name | Light Slate Gray (#778899) |
| Black text | 5.85:1 |
| White text | 3.58:1 |
Values
| HEX | #668E93 |
| RGB | rgb(102, 142, 147) |
| HSL | hsl(187, 18%, 49%) |
| OKLCH | oklch(61.9% 0.045 205.7) |
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 #668E93 | 3.58:1 | AA large text | Lc -68.9 | Content text, not long reading |
| Black text on #668E93 | 5.85:1 | AA | Lc 40.7 | Non-text elements, placeholder text |
| #668E93 text on white | 3.58:1 | AA large text | Lc 63.4 | Content text, not long reading |
| #668E93 text on black | 5.85:1 | AA | Lc -38.3 | 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
#B1C5C7
oklch(80.9% 0.022 204)
-
Step 400
400
#88A7AB
oklch(70.6% 0.035 206)
-
Step 500
500 (this color)
#668E93
oklch(61.9% 0.045 205.7)
-
Step 600
600
#507C81
oklch(55.6% 0.049 204.9)
-
Step 700
700
#41686D
oklch(49% 0.045 206.1)
-
Step 800
800
#365559
oklch(42.7% 0.037 206.1)
-
Step 900
900
#2F4649
oklch(37.6% 0.029 206.2)
-
Step 950
950
#1C292B
oklch(27% 0.018 207.9)
#668E93 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) | #888B93 | 0.044 |
| Deuteranopia (no green cones) | #808593 | 0.040 |
| Tritanopia (no blue cones) | #56918F | 0.021 |
| Achromatopsia (no color) | #878787 | 0.045 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #668E93
#668E93
oklch(61.9% 0.045 205.7)
- #9F7C78
#9F7C78
oklch(61.9% 0.044 25.9)
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 #668E93, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Slate Gray #778899 ΔE 0.030
- Steel #738595 ΔE 0.031
- Blue Grey #758DA3 ΔE 0.033
- Steel Grey #6F828A ΔE 0.034
- Dusty Teal #4C9085 ΔE 0.038
- Slate Gray #708090 ΔE 0.040
- Silver Lake Blue #778DA9 ΔE 0.043
- Cadet Blue #5F9EA0 ΔE 0.044
Use #668E93 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.