#599D9E
Closest named color: Cadet Blue (#5F9EA0). oklch(65.2% 0.069 196.8), rgb(89, 157, 158).
Aa
Black text reads best on this color (6.74:1).
About this color
#599D9E is a medium-light, muted teal or cyan. In OKLCH its lightness is 65%, its chroma 0.069 and its hue 197°. Its hue sits on the cool side of the wheel. The nearest named color is Cadet Blue (#5F9EA0), ΔE 0.008 away. Black text reads best on it, at 6.74:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (65%) |
| Chroma | muted (0.069) |
| Temperature | cool |
| Nearest name | Cadet Blue (#5F9EA0) |
| Black text | 6.74:1 |
| White text | 3.11:1 |
Values
| HEX | #599D9E |
| RGB | rgb(89, 157, 158) |
| HSL | hsl(181, 28%, 48%) |
| OKLCH | oklch(65.2% 0.069 196.8) |
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 #599D9E | 3.11:1 | AA large text | Lc -63.4 | Content text, not long reading |
| Black text on #599D9E | 6.74:1 | AA | Lc 46.0 | Large or bold text, headings |
| #599D9E text on white | 3.11:1 | AA large text | Lc 58.0 | Large or bold text, headings |
| #599D9E text on black | 6.74:1 | AA | Lc -43.7 | 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
#E3ECEC
oklch(93.6% 0.01 197)
-
Step 200
200
#CCDDDD
oklch(88.5% 0.018 196.8)
-
Step 300
300
#A8C8C8
oklch(80.9% 0.034 196.5)
-
Step 400
400
#78ABAC
oklch(70.6% 0.054 197.5)
-
Step 500
500 (this color)
#599D9E
oklch(65.2% 0.069 196.8)
-
Step 600
600
#338182
oklch(55.6% 0.075 196.4)
-
Step 700
700
#256D6E
oklch(49.1% 0.07 196.4)
-
Step 800
800
#21595A
oklch(42.8% 0.058 196.8)
-
Step 900
900
#21494A
oklch(37.7% 0.045 197.6)
-
Step 950
950
#142B2B
oklch(27% 0.029 195.6)
#599D9E 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) | #95979E | 0.072 |
| Deuteranopia (no green cones) | #898E9F | 0.068 |
| Tritanopia (no blue cones) | #37A19D | 0.027 |
| Achromatopsia (no color) | #929292 | 0.070 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #599D9E
#599D9E
oklch(65.2% 0.069 196.8)
- #B67F81
#B67F81
oklch(65.2% 0.069 16.7)
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 #599D9E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cadet Blue #5F9EA0 ΔE 0.008
- Dull Teal #5F9E8F ΔE 0.024
- Grey Teal #5E9B8A ΔE 0.028
- Sea #3C9992 ΔE 0.034
- Persian Green #2A9D8F ΔE 0.043
- Dusty Teal #4C9085 ΔE 0.050
- Greyblue #77A1B5 ΔE 0.050
- Blue Green #0F9B8E ΔE 0.053
Use #599D9E 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.