#5B99AE
Closest named color: Cadet Blue (#5F9EA0). oklch(64.9% 0.071 221.8), rgb(91, 153, 174).
Aa
Black text reads best on this color (6.61:1).
About this color
#5B99AE is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 65%, its chroma 0.071 and its hue 222°. Its hue sits on the cool side of the wheel. The nearest named color is Cadet Blue (#5F9EA0), ΔE 0.030 away. Black text reads best on it, at 6.61:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (65%) |
| Chroma | moderately saturated (0.071) |
| Temperature | cool |
| Nearest name | Cadet Blue (#5F9EA0) |
| Black text | 6.61:1 |
| White text | 3.17:1 |
Values
| HEX | #5B99AE |
| RGB | rgb(91, 153, 174) |
| HSL | hsl(195, 34%, 52%) |
| OKLCH | oklch(64.9% 0.071 221.8) |
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 #5B99AE | 3.17:1 | AA large text | Lc -64.2 | Content text, not long reading |
| Black text on #5B99AE | 6.61:1 | AA | Lc 45.3 | Large or bold text, headings |
| #5B99AE text on white | 3.17:1 | AA large text | Lc 58.8 | Large or bold text, headings |
| #5B99AE text on black | 6.61:1 | AA | Lc -42.9 | 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
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E3EBEF
oklch(93.5% 0.01 228.9)
-
Step 200
200
#CCDCE2
oklch(88.4% 0.019 222.2)
-
Step 300
300
#A9C6D1
oklch(80.9% 0.035 222.7)
-
Step 400
400
#7AA9BA
oklch(70.7% 0.056 222.3)
-
Step 500
500 (this color)
#5B99AE
oklch(64.9% 0.071 221.8)
-
Step 600
600
#387D94
oklch(55.5% 0.077 222.8)
-
Step 700
700
#296A7E
oklch(49.2% 0.072 221.6)
-
Step 800
800
#245666
oklch(42.6% 0.059 221.9)
-
Step 900
900
#234753
oklch(37.6% 0.046 221.9)
-
Step 950
950
#152A31
oklch(27.1% 0.03 221.5)
#5B99AE 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) | #8D96AF | 0.059 |
| Deuteranopia (no green cones) | #808CAE | 0.053 |
| Tritanopia (no blue cones) | #31A0A0 | 0.046 |
| Achromatopsia (no color) | #909090 | 0.071 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B99AE
#5B99AE
oklch(64.9% 0.071 221.8)
- #B5816D
#B5816D
oklch(65% 0.071 41.9)
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 #5B99AE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cadet Blue #5F9EA0 ΔE 0.030
- Blue Grey #758DA3 ΔE 0.040
- Greyblue #77A1B5 ΔE 0.041
- Silver Lake Blue #778DA9 ΔE 0.042
- Faded Blue #658CBB ΔE 0.048
- Dull Teal #5F9E8F ΔE 0.054
- Sea #3C9992 ΔE 0.054
- Light Slate Gray #778899 ΔE 0.054
Use #5B99AE 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.