#599FA4
Closest named color: Cadet Blue (#5F9EA0). oklch(65.9% 0.071 201.6), rgb(89, 159, 164).
Aa
Black text reads best on this color (6.92:1).
About this color
#599FA4 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 66%, its chroma 0.071 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 6.92:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (66%) |
| Chroma | moderately saturated (0.071) |
| Temperature | cool |
| Nearest name | Cadet Blue (#5F9EA0) |
| Black text | 6.92:1 |
| White text | 3.03:1 |
Values
| HEX | #599FA4 |
| RGB | rgb(89, 159, 164) |
| HSL | hsl(184, 30%, 50%) |
| OKLCH | oklch(65.9% 0.071 201.6) |
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 #599FA4 | 3.03:1 | AA large text | Lc -62.4 | Content text, not long reading |
| Black text on #599FA4 | 6.92:1 | AA | Lc 47.1 | Large or bold text, headings |
| #599FA4 text on white | 3.03:1 | AA large text | Lc 57.0 | Large or bold text, headings |
| #599FA4 text on black | 6.92:1 | AA | Lc -44.8 | 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
#A7C8CA
oklch(80.9% 0.035 201)
-
Step 400
400
#77ABAF
oklch(70.6% 0.055 202)
-
Step 500
500 (this color)
#599FA4
oklch(65.9% 0.071 201.6)
-
Step 600
600
#308186
oklch(55.7% 0.077 200.9)
-
Step 700
700
#226D72
oklch(49.2% 0.072 201.5)
-
Step 800
800
#1E595D
oklch(42.8% 0.06 201.5)
-
Step 900
900
#20494C
oklch(37.7% 0.046 201.8)
-
Step 950
950
#142B2C
oklch(27.1% 0.029 199.2)
#599FA4 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) | #969AA4 | 0.072 |
| Deuteranopia (no green cones) | #8990A4 | 0.066 |
| Tritanopia (no blue cones) | #32A4A0 | 0.032 |
| Achromatopsia (no color) | #949494 | 0.071 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #599FA4
#599FA4
oklch(65.9% 0.071 201.6)
- #BA817F
#BA817F
oklch(66% 0.071 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 #599FA4, 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 0.037
- Sea #3C9992 ΔE 0.041
- Greyblue #77A1B5 ΔE 0.043
- Persian Green #2A9D8F ΔE 0.050
- Bluegrey #85A3B2 ΔE 0.056
- Blue Grey #758DA3 ΔE 0.057
Use #599FA4 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.