#519BB5
Closest named color: Cadet Blue (#5F9EA0). oklch(65.2% 0.083 223.3), rgb(81, 155, 181).
Aa
Black text reads best on this color (6.70:1).
About this color
#519BB5 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 65%, its chroma 0.083 and its hue 223°. Its hue sits on the cool side of the wheel. The nearest named color is Cadet Blue (#5F9EA0), ΔE 0.037 away. Black text reads best on it, at 6.70:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (65%) |
| Chroma | moderately saturated (0.083) |
| Temperature | cool |
| Nearest name | Cadet Blue (#5F9EA0) |
| Black text | 6.70:1 |
| White text | 3.13:1 |
Values
| HEX | #519BB5 |
| RGB | rgb(81, 155, 181) |
| HSL | hsl(196, 40%, 51%) |
| OKLCH | oklch(65.2% 0.083 223.3) |
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 #519BB5 | 3.13:1 | AA large text | Lc -63.6 | Content text, not long reading |
| Black text on #519BB5 | 6.70:1 | AA | Lc 45.9 | Large or bold text, headings |
| #519BB5 text on white | 3.13:1 | AA large text | Lc 58.2 | Large or bold text, headings |
| #519BB5 text on black | 6.70:1 | AA | Lc -43.5 | 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
#E2ECF0
oklch(93.7% 0.012 223.5)
-
Step 200
200
#CADDE4
oklch(88.5% 0.023 221.8)
-
Step 300
300
#A5C7D4
oklch(80.9% 0.041 223)
-
Step 400
400
#73AABE
oklch(70.7% 0.065 222.8)
-
Step 500
500 (this color)
#519BB5
oklch(65.2% 0.083 223.3)
-
Step 600
600
#277E9A
oklch(55.5% 0.091 223.8)
-
Step 700
700
#186B83
oklch(49.2% 0.083 222.4)
-
Step 800
800
#18576B
oklch(42.7% 0.07 223.5)
-
Step 900
900
#1C4857
oklch(37.8% 0.054 223.5)
-
Step 950
950
#122A33
oklch(27% 0.034 224.8)
#519BB5 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) | #8C98B6 | 0.066 |
| Deuteranopia (no green cones) | #7E8DB5 | 0.059 |
| Tritanopia (no blue cones) | #00A3A3 | 0.055 |
| Achromatopsia (no color) | #919191 | 0.083 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #519BB5
#519BB5
oklch(65.2% 0.083 223.3)
- #BB7F66
#BB7F66
oklch(65.2% 0.083 43.4)
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 #519BB5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cadet Blue #5F9EA0 ΔE 0.037
- Greyblue #77A1B5 ΔE 0.045
- Faded Blue #658CBB ΔE 0.049
- Blue Grey #758DA3 ΔE 0.050
- Silver Lake Blue #778DA9 ΔE 0.051
- Sea #3C9992 ΔE 0.058
- Dusty Blue #5A86AD ΔE 0.058
- Dull Teal #5F9E8F ΔE 0.061
Use #519BB5 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.