#6B9999
Closest named color: Cadet Blue (#5F9EA0). oklch(65% 0.05 196), rgb(107, 153, 153).
Aa
Black text reads best on this color (6.64:1).
About this color
#6B9999 is a medium-light, muted teal or cyan. In OKLCH its lightness is 65%, its chroma 0.050 and its hue 196°. Its hue sits on the cool side of the wheel. The nearest named color is Cadet Blue (#5F9EA0), ΔE 0.017 away. Black text reads best on it, at 6.64:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (65%) |
| Chroma | muted (0.050) |
| Temperature | cool |
| Nearest name | Cadet Blue (#5F9EA0) |
| Black text | 6.64:1 |
| White text | 3.16:1 |
Values
| HEX | #6B9999 |
| RGB | rgb(107, 153, 153) |
| HSL | hsl(180, 18%, 51%) |
| OKLCH | oklch(65% 0.05 196) |
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 #6B9999 | 3.16:1 | AA large text | Lc -64.1 | Content text, not long reading |
| Black text on #6B9999 | 6.64:1 | AA | Lc 45.4 | Large or bold text, headings |
| #6B9999 text on white | 3.16:1 | AA large text | Lc 58.7 | Large or bold text, headings |
| #6B9999 text on black | 6.64:1 | AA | Lc -43.0 | 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
#E5EBEB
oklch(93.6% 0.006 197)
-
Step 200
200
#D0DCDC
oklch(88.5% 0.013 196.9)
-
Step 300
300
#AFC6C6
oklch(80.9% 0.025 196.7)
-
Step 400
400
#85A9A8
oklch(70.8% 0.039 194.2)
-
Step 500
500 (this color)
#6B9999
oklch(65% 0.05 196)
-
Step 600
600
#4B7D7E
oklch(55.5% 0.054 197.3)
-
Step 700
700
#3C6A6A
oklch(49.2% 0.051 195.6)
-
Step 800
800
#325656
oklch(42.6% 0.042 195.7)
-
Step 900
900
#2C4747
oklch(37.6% 0.033 195.8)
-
Step 950
950
#1A2A2A
oklch(27.1% 0.021 196)
#6B9999 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) | #939599 | 0.052 |
| Deuteranopia (no green cones) | #8A8E99 | 0.048 |
| Tritanopia (no blue cones) | #5A9C99 | 0.019 |
| Achromatopsia (no color) | #919191 | 0.050 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6B9999
#6B9999
oklch(65% 0.05 196)
- #AB8385
#AB8385
oklch(64.9% 0.049 15.2)
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 #6B9999, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cadet Blue #5F9EA0 ΔE 0.017
- Dull Teal #5F9E8F ΔE 0.028
- Grey Teal #5E9B8A ΔE 0.030
- Blue Grey #758DA3 ΔE 0.043
- Sea #3C9992 ΔE 0.046
- Greyblue #77A1B5 ΔE 0.046
- Light Slate Gray #778899 ΔE 0.050
- Silver Lake Blue #778DA9 ΔE 0.050
Use #6B9999 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.