#599FAE
Closest named color: Cadet Blue (#5F9EA0). oklch(66.2% 0.074 213.1), rgb(89, 159, 174).
Aa
Black text reads best on this color (6.99:1).
About this color
#599FAE is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 66%, its chroma 0.074 and its hue 213°. Its hue sits on the cool side of the wheel. The nearest named color is Cadet Blue (#5F9EA0), ΔE 0.020 away. Black text reads best on it, at 6.99:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (66%) |
| Chroma | moderately saturated (0.074) |
| Temperature | cool |
| Nearest name | Cadet Blue (#5F9EA0) |
| Black text | 6.99:1 |
| White text | 3.00:1 |
Values
| HEX | #599FAE |
| RGB | rgb(89, 159, 174) |
| HSL | hsl(191, 34%, 52%) |
| OKLCH | oklch(66.2% 0.074 213.1) |
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 #599FAE | 3.00:1 | AA large text | Lc -61.9 | Content text, not long reading |
| Black text on #599FAE | 6.99:1 | AA | Lc 47.5 | Large or bold text, headings |
| #599FAE text on white | 3.00:1 | AA large text | Lc 56.6 | Large or bold text, headings |
| #599FAE text on black | 6.99:1 | AA | Lc -45.2 | Large or bold text, headings |
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
#E2ECEE
oklch(93.6% 0.011 211)
-
Step 200
200
#CBDDE1
oklch(88.5% 0.02 212.6)
-
Step 300
300
#A7C7CF
oklch(80.9% 0.036 214.5)
-
Step 400
400
#76ABB6
oklch(70.8% 0.058 212)
-
Step 500
500 (this color)
#599FAE
oklch(66.2% 0.074 213.1)
-
Step 600
600
#2F7F8F
oklch(55.5% 0.08 213.3)
-
Step 700
700
#206C7A
oklch(49.2% 0.075 212.5)
-
Step 800
800
#1D5863
oklch(42.8% 0.062 212.3)
-
Step 900
900
#1F4851
oklch(37.6% 0.048 214.1)
-
Step 950
950
#132A2F
oklch(26.9% 0.03 213.4)
#599FAE 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) | #939BAF | 0.067 |
| Deuteranopia (no green cones) | #8691AE | 0.061 |
| Tritanopia (no blue cones) | #2AA5A4 | 0.041 |
| Achromatopsia (no color) | #959595 | 0.074 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #599FAE
#599FAE
oklch(66.2% 0.074 213.1)
- #BC8276
#BC8276
oklch(66.2% 0.075 32.1)
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 #599FAE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cadet Blue #5F9EA0 ΔE 0.020
- Greyblue #77A1B5 ΔE 0.035
- Dull Teal #5F9E8F ΔE 0.046
- Grey Teal #5E9B8A ΔE 0.051
- Bluegrey #85A3B2 ΔE 0.052
- Sea #3C9992 ΔE 0.052
- Blue Grey #758DA3 ΔE 0.054
- Bluey Grey #89A0B0 ΔE 0.055
Use #599FAE 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.