#599EA3
Closest named color: Cadet Blue (#5F9EA0). oklch(65.6% 0.07 201.6), rgb(89, 158, 163).
Aa
Black text reads best on this color (6.84:1).
About this color
#599EA3 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 66%, its chroma 0.070 and its hue 202°. Its hue sits on the cool side of the wheel. The nearest named color is Cadet Blue (#5F9EA0), ΔE 0.007 away. Black text reads best on it, at 6.84:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (66%) |
| Chroma | moderately saturated (0.070) |
| Temperature | cool |
| Nearest name | Cadet Blue (#5F9EA0) |
| Black text | 6.84:1 |
| White text | 3.06:1 |
Values
| HEX | #599EA3 |
| RGB | rgb(89, 158, 163) |
| HSL | hsl(184, 29%, 49%) |
| OKLCH | oklch(65.6% 0.07 201.6) |
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 #599EA3 | 3.06:1 | AA large text | Lc -62.8 | Content text, not long reading |
| Black text on #599EA3 | 6.84:1 | AA | Lc 46.6 | Large or bold text, headings |
| #599EA3 text on white | 3.06:1 | AA large text | Lc 57.4 | Large or bold text, headings |
| #599EA3 text on black | 6.84:1 | AA | Lc -44.3 | 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
#F2F6F7
oklch(97% 0.004 214.3)
-
Step 100
100
#E3ECED
oklch(93.7% 0.01 204.9)
-
Step 200
200
#CBDDDE
oklch(88.4% 0.019 200.8)
-
Step 300
300
#A8C8CA
oklch(81% 0.034 201.2)
-
Step 400
400
#77ABAF
oklch(70.6% 0.055 202)
-
Step 500
500 (this color)
#599EA3
oklch(65.6% 0.07 201.6)
-
Step 600
600
#318186
oklch(55.7% 0.077 201)
-
Step 700
700
#236D72
oklch(49.2% 0.071 201.5)
-
Step 800
800
#1F595D
oklch(42.8% 0.059 201.6)
-
Step 900
900
#20494C
oklch(37.7% 0.046 201.8)
-
Step 950
950
#142B2C
oklch(27.1% 0.029 199.2)
#599EA3 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) | #9599A3 | 0.071 |
| Deuteranopia (no green cones) | #888FA3 | 0.066 |
| Tritanopia (no blue cones) | #33A39F | 0.032 |
| Achromatopsia (no color) | #939393 | 0.071 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #599EA3
#599EA3
oklch(65.6% 0.07 201.6)
- #B8807E
#B8807E
oklch(65.6% 0.07 21.4)
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 #599EA3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cadet Blue #5F9EA0 ΔE 0.007
- Dull Teal #5F9E8F ΔE 0.030
- Grey Teal #5E9B8A ΔE 0.035
- Sea #3C9992 ΔE 0.039
- Greyblue #77A1B5 ΔE 0.045
- Persian Green #2A9D8F ΔE 0.049
- Blue Grey #758DA3 ΔE 0.055
- Dusty Teal #4C9085 ΔE 0.056
Use #599EA3 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.