#599D99
Closest named color: Cadet Blue (#5F9EA0). oklch(65% 0.07 190.7), rgb(89, 157, 153).
Aa
Black text reads best on this color (6.70:1).
About this color
#599D99 is a medium-light, muted teal or cyan. In OKLCH its lightness is 65%, its chroma 0.070 and its hue 191°. Its hue sits on the cool side of the wheel. The nearest named color is Cadet Blue (#5F9EA0), ΔE 0.013 away. Black text reads best on it, at 6.70:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (65%) |
| Chroma | muted (0.070) |
| Temperature | cool |
| Nearest name | Cadet Blue (#5F9EA0) |
| Black text | 6.70:1 |
| White text | 3.13:1 |
Values
| HEX | #599D99 |
| RGB | rgb(89, 157, 153) |
| HSL | hsl(176, 28%, 48%) |
| OKLCH | oklch(65% 0.07 190.7) |
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 #599D99 | 3.13:1 | AA large text | Lc -63.6 | Content text, not long reading |
| Black text on #599D99 | 6.70:1 | AA | Lc 45.8 | Large or bold text, headings |
| #599D99 text on white | 3.13:1 | AA large text | Lc 58.2 | Large or bold text, headings |
| #599D99 text on black | 6.70:1 | AA | Lc -43.5 | 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
#F2F6F6
oklch(97% 0.004 197.1)
-
Step 100
100
#E3ECEB
oklch(93.6% 0.01 189.1)
-
Step 200
200
#CCDDDC
oklch(88.4% 0.018 192.6)
-
Step 300
300
#A8C8C6
oklch(80.9% 0.034 191.8)
-
Step 400
400
#79ACA8
oklch(70.7% 0.054 189.9)
-
Step 500
500 (this color)
#599D99
oklch(65% 0.07 190.7)
-
Step 600
600
#34817E
oklch(55.5% 0.075 191.7)
-
Step 700
700
#256D6A
oklch(49% 0.07 191.2)
-
Step 800
800
#215956
oklch(42.6% 0.058 190.3)
-
Step 900
900
#214947
oklch(37.6% 0.045 191.1)
-
Step 950
950
#142B2A
oklch(27% 0.029 191.9)
#599D99 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) | #969799 | 0.074 |
| Deuteranopia (no green cones) | #8A8E9A | 0.069 |
| Tritanopia (no blue cones) | #3AA09C | 0.023 |
| Achromatopsia (no color) | #929292 | 0.070 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #599D99
#599D99
oklch(65% 0.07 190.7)
- #B57E85
#B57E85
oklch(65% 0.069 10.7)
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 #599D99, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cadet Blue #5F9EA0 ΔE 0.013
- Dull Teal #5F9E8F ΔE 0.017
- Grey Teal #5E9B8A ΔE 0.021
- Sea #3C9992 ΔE 0.030
- Persian Green #2A9D8F ΔE 0.039
- Dusty Teal #4C9085 ΔE 0.046
- Blue Green #0F9B8E ΔE 0.049
- Greyblue #77A1B5 ΔE 0.056
Use #599D99 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.