#17567C
Closest named color: Deep Sea Blue (#015482). oklch(43.3% 0.088 240.4), rgb(23, 86, 124).
Aa
White text reads best on this color (7.89:1).
About this color
#17567C is a dark, moderately saturated blue. In OKLCH its lightness is 43%, its chroma 0.088 and its hue 240°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sea Blue (#015482), ΔE 0.016 away. White text reads best on it, at 7.89:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.088) |
| Temperature | cool |
| Nearest name | Deep Sea Blue (#015482) |
| Black text | 2.65:1 |
| White text | 7.89:1 |
Values
| HEX | #17567C |
| RGB | rgb(23, 86, 124) |
| HSL | hsl(203, 69%, 29%) |
| OKLCH | oklch(43.3% 0.088 240.4) |
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 #17567C | 7.89:1 | AAA | Lc -91.8 | Preferred for body text |
| Black text on #17567C | 2.65:1 | Fails | Lc 16.9 | Dividers and decoration only |
| #17567C text on white | 7.89:1 | AAA | Lc 87.1 | Fine for body text |
| #17567C text on black | 2.65:1 | Fails | Lc -15.0 | 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 800.
-
Step 50
50
#F1F6FA
oklch(97.1% 0.008 241.7)
-
Step 100
100
#E1EBF3
oklch(93.5% 0.015 241.8)
-
Step 200
200
#C9DCEB
oklch(88.5% 0.029 241.6)
-
Step 300
300
#A3C6DF
oklch(80.9% 0.052 239.4)
-
Step 400
400
#70A8CF
oklch(70.8% 0.082 239.8)
-
Step 500
500
#4791C3
oklch(63.1% 0.105 240.8)
-
Step 600
600
#237BAF
oklch(55.7% 0.114 240.1)
-
Step 700
700
#136797
oklch(49.1% 0.107 240.7)
-
Step 800
800 (this color)
#17567C
oklch(43.3% 0.088 240.4)
-
Step 900
900
#1A4662
oklch(37.8% 0.068 240)
-
Step 950
950
#10293A
oklch(27% 0.044 240.8)
#17567C 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) | #44567E | 0.045 |
| Deuteranopia (no green cones) | #364D7B | 0.035 |
| Tritanopia (no blue cones) | #005F63 | 0.058 |
| Achromatopsia (no color) | #515151 | 0.088 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #17567C
#17567C
oklch(43.3% 0.088 240.4)
- #734415
#734415
oklch(43.4% 0.088 61.1)
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 #17567C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sea Blue #015482 ΔE 0.016
- Light Navy #155084 ΔE 0.025
- Light Navy Blue #2E5A88 ΔE 0.030
- Dusk Blue #26538D ΔE 0.034
- YInMn Blue #415A77 ΔE 0.044
- Petrol #005F6A ΔE 0.048
- Denim Blue #3B5B92 ΔE 0.052
- Cobalt #1E488F ΔE 0.057
Use #17567C 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.