#17536D
Closest named color: Deep Sea Blue (#015482). oklch(41.7% 0.073 231.3), rgb(23, 83, 109).
Aa
White text reads best on this color (8.41:1).
About this color
#17536D is a dark, moderately saturated blue. In OKLCH its lightness is 42%, its chroma 0.073 and its hue 231°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sea Blue (#015482), ΔE 0.035 away. White text reads best on it, at 8.41:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.073) |
| Temperature | cool |
| Nearest name | Deep Sea Blue (#015482) |
| Black text | 2.49:1 |
| White text | 8.41:1 |
Values
| HEX | #17536D |
| RGB | rgb(23, 83, 109) |
| HSL | hsl(198, 65%, 26%) |
| OKLCH | oklch(41.7% 0.073 231.3) |
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 #17536D | 8.41:1 | AAA | Lc -93.3 | Preferred for body text |
| Black text on #17536D | 2.49:1 | Fails | Lc 15.3 | Dividers and decoration only |
| #17536D text on white | 8.41:1 | AAA | Lc 88.7 | Fine for body text |
| #17536D text on black | 2.49:1 | Fails | Lc -13.5 | Not readable |
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 800.
-
Step 50
50
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E2ECF1
oklch(93.7% 0.013 228.9)
-
Step 200
200
#CADCE6
oklch(88.4% 0.024 231.9)
-
Step 300
300
#A6C6D8
oklch(80.9% 0.043 232.7)
-
Step 400
400
#74A9C4
oklch(70.8% 0.068 231.1)
-
Step 500
500
#4C93B5
oklch(63.1% 0.088 231.2)
-
Step 600
600
#2B7DA1
oklch(55.7% 0.095 231.2)
-
Step 700
700
#1C698A
oklch(49.1% 0.089 231.6)
-
Step 800
800 (this color)
#17536D
oklch(41.7% 0.073 231.3)
-
Step 900
900
#1D475B
oklch(37.8% 0.058 231.8)
-
Step 950
950
#122A35
oklch(27.1% 0.036 229.8)
#17536D 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) | #46526E | 0.049 |
| Deuteranopia (no green cones) | #3A4A6D | 0.041 |
| Tritanopia (no blue cones) | #005A5C | 0.043 |
| Achromatopsia (no color) | #4D4D4D | 0.073 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #17536D
#17536D
oklch(41.7% 0.073 231.3)
- #6C4025
#6C4025
oklch(41.8% 0.073 51.1)
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 #17536D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sea Blue #015482 ΔE 0.035
- Deep Teal #00555A ΔE 0.038
- Petrol #005F6A ΔE 0.040
- Light Navy #155084 ΔE 0.042
- Dark Grey Blue #29465B ΔE 0.044
- Dark Slate Gray #2F4F4F ΔE 0.050
- Charcoal #264653 ΔE 0.052
- YInMn Blue #415A77 ΔE 0.052
Use #17536D 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.