#599FA7
Closest named color: Cadet Blue (#5F9EA0). oklch(66% 0.072 205.1), rgb(89, 159, 167).
Aa
Black text reads best on this color (6.94:1).
About this color
#599FA7 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 66%, its chroma 0.072 and its hue 205°. Its hue sits on the cool side of the wheel. The nearest named color is Cadet Blue (#5F9EA0), ΔE 0.011 away. Black text reads best on it, at 6.94:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (66%) |
| Chroma | moderately saturated (0.072) |
| Temperature | cool |
| Nearest name | Cadet Blue (#5F9EA0) |
| Black text | 6.94:1 |
| White text | 3.02:1 |
Values
| HEX | #599FA7 |
| RGB | rgb(89, 159, 167) |
| HSL | hsl(186, 31%, 50%) |
| OKLCH | oklch(66% 0.072 205.1) |
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 #599FA7 | 3.02:1 | AA large text | Lc -62.2 | Content text, not long reading |
| Black text on #599FA7 | 6.94:1 | AA | Lc 47.2 | Large or bold text, headings |
| #599FA7 text on white | 3.02:1 | AA large text | Lc 56.9 | Large or bold text, headings |
| #599FA7 text on black | 6.94:1 | AA | Lc -44.9 | 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
#CBDDDF
oklch(88.5% 0.019 204.8)
-
Step 300
300
#A7C8CB
oklch(81% 0.036 203.2)
-
Step 400
400
#77ABB1
oklch(70.7% 0.055 205)
-
Step 500
500 (this color)
#599FA7
oklch(66% 0.072 205.1)
-
Step 600
600
#308089
oklch(55.5% 0.077 205.6)
-
Step 700
700
#216C74
oklch(49% 0.072 205.3)
-
Step 800
800
#1E585F
oklch(42.6% 0.06 206.3)
-
Step 900
900
#1F494D
oklch(37.7% 0.047 203.7)
-
Step 950
950
#132B2D
oklch(27.1% 0.03 202.6)
#599FA7 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) | #959AA8 | 0.071 |
| Deuteranopia (no green cones) | #8890A7 | 0.065 |
| Tritanopia (no blue cones) | #30A4A1 | 0.034 |
| Achromatopsia (no color) | #949494 | 0.072 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #599FA7
#599FA7
oklch(66% 0.072 205.1)
- #BA817C
#BA817C
oklch(65.9% 0.072 24.8)
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 #599FA7, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cadet Blue #5F9EA0 ΔE 0.011
- Dull Teal #5F9E8F ΔE 0.035
- Greyblue #77A1B5 ΔE 0.040
- Grey Teal #5E9B8A ΔE 0.041
- Sea #3C9992 ΔE 0.044
- Persian Green #2A9D8F ΔE 0.053
- Bluegrey #85A3B2 ΔE 0.055
- Blue Grey #758DA3 ΔE 0.055
Use #599FA7 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.