#17436C
Closest named color: Twilight Blue (#0A437A). oklch(37.5% 0.085 249.9), rgb(23, 67, 108).
Aa
White text reads best on this color (10.21:1).
About this color
#17436C is a dark, moderately saturated blue. In OKLCH its lightness is 37%, its chroma 0.085 and its hue 250°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.025 away. White text reads best on it, at 10.21:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.085) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.05:1 |
| White text | 10.21:1 |
Values
| HEX | #17436C |
| RGB | rgb(23, 67, 108) |
| HSL | hsl(209, 65%, 26%) |
| OKLCH | oklch(37.5% 0.085 249.9) |
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 #17436C | 10.21:1 | AAA | Lc -97.5 | Preferred for body text |
| Black text on #17436C | 2.05:1 | Fails | Lc 10.5 | Not readable |
| #17436C text on white | 10.21:1 | AAA | Lc 93.4 | Preferred for body text |
| #17436C text on black | 2.05:1 | Fails | Lc -9.1 | 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 900.
-
Step 50
50
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E1EBF6
oklch(93.6% 0.018 250.6)
-
Step 200
200
#C8DCF0
oklch(88.6% 0.035 248.2)
-
Step 300
300
#A2C4E9
oklch(80.8% 0.064 250.8)
-
Step 400
400
#6EA5DE
oklch(70.7% 0.102 250.3)
-
Step 500
500
#448ED5
oklch(63.2% 0.13 249.8)
-
Step 600
600
#1F76C2
oklch(55.5% 0.142 250)
-
Step 700
700
#0E63A8
oklch(49.1% 0.132 250)
-
Step 800
800
#125188
oklch(42.7% 0.11 250.1)
-
Step 900
900 (this color)
#17436C
oklch(37.5% 0.085 249.9)
-
Step 950
950
#0F2840
oklch(27% 0.055 249.7)
#17436C 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) | #30456E | 0.028 |
| Deuteranopia (no green cones) | #243D6B | 0.020 |
| Tritanopia (no blue cones) | #004D52 | 0.064 |
| Achromatopsia (no color) | #414141 | 0.085 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #17436C
#17436C
oklch(37.5% 0.085 249.9)
- #5C3800
#5C3800
oklch(37.5% 0.081 70)
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 #17436C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.025
- Dark Grey Blue #29465B ΔE 0.037
- Marine Blue #01386A ΔE 0.039
- Charcoal #264653 ΔE 0.048
- Prussian Blue #1D3557 ΔE 0.051
- Light Navy #155084 ΔE 0.052
- Dark Blue Grey #1F3B4D ΔE 0.054
- Deep Sea Blue #015482 ΔE 0.057
Use #17436C 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.