#599AA9
Closest named color: Cadet Blue (#5F9EA0). oklch(64.8% 0.07 214.3), rgb(89, 154, 169).
Aa
Black text reads best on this color (6.61:1).
About this color
#599AA9 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 65%, its chroma 0.070 and its hue 214°. Its hue sits on the cool side of the wheel. The nearest named color is Cadet Blue (#5F9EA0), ΔE 0.021 away. Black text reads best on it, at 6.61:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (65%) |
| Chroma | moderately saturated (0.070) |
| Temperature | cool |
| Nearest name | Cadet Blue (#5F9EA0) |
| Black text | 6.61:1 |
| White text | 3.17:1 |
Values
| HEX | #599AA9 |
| RGB | rgb(89, 154, 169) |
| HSL | hsl(191, 32%, 51%) |
| OKLCH | oklch(64.8% 0.07 214.3) |
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 #599AA9 | 3.17:1 | AA large text | Lc -64.2 | Content text, not long reading |
| Black text on #599AA9 | 6.61:1 | AA | Lc 45.3 | Large or bold text, headings |
| #599AA9 text on white | 3.17:1 | AA large text | Lc 58.7 | Large or bold text, headings |
| #599AA9 text on black | 6.61:1 | AA | Lc -43.0 | 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
#E3ECEE
oklch(93.7% 0.01 212.5)
-
Step 200
200
#CCDDE1
oklch(88.6% 0.019 213.4)
-
Step 300
300
#A8C7CE
oklch(80.9% 0.035 212.9)
-
Step 400
400
#79AAB6
oklch(70.8% 0.055 214.6)
-
Step 500
500 (this color)
#599AA9
oklch(64.8% 0.07 214.3)
-
Step 600
600
#357F8F
oklch(55.7% 0.076 214.2)
-
Step 700
700
#276B79
oklch(49.1% 0.07 213.8)
-
Step 800
800
#225763
oklch(42.7% 0.059 215.1)
-
Step 900
900
#224850
oklch(37.7% 0.045 213.1)
-
Step 950
950
#152A2F
oklch(27% 0.028 214.7)
#599AA9 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) | #8F96AA | 0.064 |
| Deuteranopia (no green cones) | #828CA9 | 0.059 |
| Tritanopia (no blue cones) | #30A09F | 0.040 |
| Achromatopsia (no color) | #909090 | 0.070 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #599AA9
#599AA9
oklch(64.8% 0.07 214.3)
- #B57F72
#B57F72
oklch(64.7% 0.07 34)
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 #599AA9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cadet Blue #5F9EA0 ΔE 0.021
- Greyblue #77A1B5 ΔE 0.043
- Blue Grey #758DA3 ΔE 0.044
- Dull Teal #5F9E8F ΔE 0.045
- Sea #3C9992 ΔE 0.045
- Silver Lake Blue #778DA9 ΔE 0.047
- Grey Teal #5E9B8A ΔE 0.048
- Light Slate Gray #778899 ΔE 0.055
Use #599AA9 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.