#599BB2
Closest named color: Cadet Blue (#5F9EA0). oklch(65.4% 0.075 222.6), rgb(89, 155, 178).
Aa
Black text reads best on this color (6.75:1).
About this color
#599BB2 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 65%, its chroma 0.075 and its hue 223°. Its hue sits on the cool side of the wheel. The nearest named color is Cadet Blue (#5F9EA0), ΔE 0.031 away. Black text reads best on it, at 6.75:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (65%) |
| Chroma | moderately saturated (0.075) |
| Temperature | cool |
| Nearest name | Cadet Blue (#5F9EA0) |
| Black text | 6.75:1 |
| White text | 3.10:1 |
Values
| HEX | #599BB2 |
| RGB | rgb(89, 155, 178) |
| HSL | hsl(196, 37%, 52%) |
| OKLCH | oklch(65.4% 0.075 222.6) |
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 #599BB2 | 3.10:1 | AA large text | Lc -63.3 | Content text, not long reading |
| Black text on #599BB2 | 6.75:1 | AA | Lc 46.1 | Large or bold text, headings |
| #599BB2 text on white | 3.10:1 | AA large text | Lc 57.9 | Large or bold text, headings |
| #599BB2 text on black | 6.75:1 | AA | Lc -43.8 | 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
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E3ECEF
oklch(93.7% 0.01 219.6)
-
Step 200
200
#CBDCE3
oklch(88.4% 0.021 224.3)
-
Step 300
300
#A8C6D2
oklch(80.8% 0.036 224)
-
Step 400
400
#77A9BB
oklch(70.6% 0.059 222.4)
-
Step 500
500 (this color)
#599BB2
oklch(65.4% 0.075 222.6)
-
Step 600
600
#337E96
oklch(55.7% 0.082 222.4)
-
Step 700
700
#246A80
oklch(49.1% 0.076 222.7)
-
Step 800
800
#205768
oklch(42.8% 0.063 221.7)
-
Step 900
900
#214755
oklch(37.6% 0.049 224.6)
-
Step 950
950
#142A31
oklch(27% 0.031 220.6)
#599BB2 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) | #8E98B3 | 0.062 |
| Deuteranopia (no green cones) | #808EB2 | 0.054 |
| Tritanopia (no blue cones) | #27A2A2 | 0.050 |
| Achromatopsia (no color) | #929292 | 0.076 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #599BB2
#599BB2
oklch(65.4% 0.075 222.6)
- #B8816C
#B8816C
oklch(65.3% 0.075 41.8)
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 #599BB2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cadet Blue #5F9EA0 ΔE 0.031
- Greyblue #77A1B5 ΔE 0.038
- Blue Grey #758DA3 ΔE 0.045
- Silver Lake Blue #778DA9 ΔE 0.046
- Faded Blue #658CBB ΔE 0.049
- Dull Teal #5F9E8F ΔE 0.056
- Bluegrey #85A3B2 ΔE 0.057
- Sea #3C9992 ΔE 0.057
Use #599BB2 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.