#5599AA
Closest named color: Cadet Blue (#5F9EA0). oklch(64.5% 0.073 215.8), rgb(85, 153, 170).
Aa
Black text reads best on this color (6.52:1).
About this color
#5599AA is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 64%, its chroma 0.073 and its hue 216°. Its hue sits on the cool side of the wheel. The nearest named color is Cadet Blue (#5F9EA0), ΔE 0.026 away. Black text reads best on it, at 6.52:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (64%) |
| Chroma | moderately saturated (0.073) |
| Temperature | cool |
| Nearest name | Cadet Blue (#5F9EA0) |
| Black text | 6.52:1 |
| White text | 3.21:1 |
Values
| HEX | #5599AA |
| RGB | rgb(85, 153, 170) |
| HSL | hsl(192, 33%, 50%) |
| OKLCH | oklch(64.5% 0.073 215.8) |
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 #5599AA | 3.21:1 | AA large text | Lc -64.7 | Content text, not long reading |
| Black text on #5599AA | 6.52:1 | AA | Lc 44.8 | Non-text elements, placeholder text |
| #5599AA text on white | 3.21:1 | AA large text | Lc 59.3 | Large or bold text, headings |
| #5599AA text on black | 6.52:1 | AA | Lc -42.4 | 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
#CBDDE1
oklch(88.5% 0.02 212.6)
-
Step 300
300
#A7C7CF
oklch(80.9% 0.036 214.5)
-
Step 400
400
#77AAB7
oklch(70.7% 0.057 215.4)
-
Step 500
500 (this color)
#5599AA
oklch(64.5% 0.073 215.8)
-
Step 600
600
#317F91
oklch(55.6% 0.08 215.7)
-
Step 700
700
#226B7B
oklch(49.1% 0.074 215.4)
-
Step 800
800
#1F5764
oklch(42.6% 0.061 215.9)
-
Step 900
900
#204852
oklch(37.7% 0.048 216.3)
-
Step 950
950
#142A30
oklch(27% 0.03 217.4)
#5599AA 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) | #8D95AB | 0.065 |
| Deuteranopia (no green cones) | #808BAA | 0.060 |
| Tritanopia (no blue cones) | #249F9E | 0.043 |
| Achromatopsia (no color) | #8F8F8F | 0.074 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5599AA
#5599AA
oklch(64.5% 0.073 215.8)
- #B57E6F
#B57E6F
oklch(64.5% 0.073 35.9)
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 #5599AA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cadet Blue #5F9EA0 ΔE 0.026
- Blue Grey #758DA3 ΔE 0.044
- Sea #3C9992 ΔE 0.045
- Silver Lake Blue #778DA9 ΔE 0.047
- Greyblue #77A1B5 ΔE 0.047
- Dull Teal #5F9E8F ΔE 0.048
- Grey Teal #5E9B8A ΔE 0.051
- Faded Blue #658CBB ΔE 0.054
Use #5599AA 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.