#15799B
Closest named color: Sea Blue (#047495). oklch(53.9% 0.099 227.5), rgb(21, 121, 155).
Aa
White text reads best on this color (4.95:1).
About this color
#15799B is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 54%, its chroma 0.099 and its hue 227°. Its hue sits on the cool side of the wheel. The nearest named color is Sea Blue (#047495), ΔE 0.018 away. White text reads best on it, at 4.95:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (54%) |
| Chroma | moderately saturated (0.099) |
| Temperature | cool |
| Nearest name | Sea Blue (#047495) |
| Black text | 4.24:1 |
| White text | 4.95:1 |
Values
| HEX | #15799B |
| RGB | rgb(21, 121, 155) |
| HSL | hsl(195, 76%, 35%) |
| OKLCH | oklch(53.9% 0.099 227.5) |
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 #15799B | 4.95:1 | AA | Lc -79.3 | Fine for body text |
| Black text on #15799B | 4.24:1 | AA large text | Lc 30.2 | Non-text elements, placeholder text |
| #15799B text on white | 4.95:1 | AA | Lc 73.8 | Content text, not long reading |
| #15799B text on black | 4.24:1 | AA large text | Lc -27.9 | Dividers and decoration only |
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 600.
-
Step 50
50
#F1F6F9
oklch(97% 0.007 233.6)
-
Step 100
100
#E1ECF1
oklch(93.6% 0.014 226.6)
-
Step 200
200
#C9DDE6
oklch(88.5% 0.025 226.5)
-
Step 300
300
#A3C7D7
oklch(80.9% 0.045 226.7)
-
Step 400
400
#70AAC3
oklch(70.7% 0.071 227)
-
Step 500
500
#4594B4
oklch(63% 0.091 227.4)
-
Step 600
600 (this color)
#15799B
oklch(53.9% 0.099 227.5)
-
Step 700
700
#0C6A89
oklch(49% 0.092 227.6)
-
Step 800
800
#11576F
oklch(42.7% 0.076 226.7)
-
Step 900
900
#18485A
oklch(37.8% 0.059 226.5)
-
Step 950
950
#102A35
oklch(27% 0.038 228.2)
#15799B 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) | #67779D | 0.072 |
| Deuteranopia (no green cones) | #566B9B | 0.062 |
| Tritanopia (no blue cones) | #008384 | 0.055 |
| Achromatopsia (no color) | #707070 | 0.099 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #15799B
#15799B
oklch(53.9% 0.099 227.5)
- #9D5B39
#9D5B39
oklch(54% 0.099 47.1)
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 #15799B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sea Blue #047495 ΔE 0.018
- Ocean #017B92 ΔE 0.018
- Ocean Blue #03719C ΔE 0.026
- Muted Blue #3B719F ΔE 0.033
- Nice Blue #107AB0 ΔE 0.033
- Cerulean #457B9D ΔE 0.034
- Dull Blue #49759C ΔE 0.037
- Flat Blue #3C73A8 ΔE 0.039
Use #15799B 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.