#17507A
Closest named color: Deep Sea Blue (#015482). oklch(41.7% 0.091 245.2), rgb(23, 80, 122).
Aa
White text reads best on this color (8.51:1).
About this color
#17507A is a dark, moderately saturated blue. In OKLCH its lightness is 42%, its chroma 0.091 and its hue 245°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sea Blue (#015482), ΔE 0.017 away. White text reads best on it, at 8.51:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.091) |
| Temperature | cool |
| Nearest name | Deep Sea Blue (#015482) |
| Black text | 2.46:1 |
| White text | 8.51:1 |
Values
| HEX | #17507A |
| RGB | rgb(23, 80, 122) |
| HSL | hsl(205, 68%, 28%) |
| OKLCH | oklch(41.7% 0.091 245.2) |
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 #17507A | 8.51:1 | AAA | Lc -93.5 | Preferred for body text |
| Black text on #17507A | 2.46:1 | Fails | Lc 15.0 | Dividers and decoration only |
| #17507A text on white | 8.51:1 | AAA | Lc 89.0 | Fine for body text |
| #17507A text on black | 2.46:1 | Fails | Lc -13.2 | 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
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E2EBF4
oklch(93.6% 0.016 248)
-
Step 200
200
#CADCEC
oklch(88.6% 0.029 244.9)
-
Step 300
300
#A5C5E1
oklch(80.9% 0.053 244.9)
-
Step 400
400
#73A6D2
oklch(70.6% 0.085 245.4)
-
Step 500
500
#4B90C7
oklch(63.2% 0.109 244.8)
-
Step 600
600
#2B79B3
oklch(55.6% 0.117 245)
-
Step 700
700
#1C659A
oklch(49% 0.11 245.3)
-
Step 800
800 (this color)
#17507A
oklch(41.7% 0.091 245.2)
-
Step 900
900
#1D4565
oklch(37.8% 0.071 245.5)
-
Step 950
950
#12283B
oklch(26.9% 0.045 246.6)
#17507A 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) | #3C527C | 0.038 |
| Deuteranopia (no green cones) | #2E4879 | 0.028 |
| Tritanopia (no blue cones) | #005A5F | 0.064 |
| Achromatopsia (no color) | #4D4D4D | 0.091 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #17507A
#17507A
oklch(41.7% 0.091 245.2)
- #6D4005
#6D4005
oklch(41.6% 0.091 65.1)
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 #17507A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sea Blue #015482 ΔE 0.017
- Light Navy #155084 ΔE 0.017
- Dusk Blue #26538D ΔE 0.035
- Twilight Blue #0A437A ΔE 0.042
- Light Navy Blue #2E5A88 ΔE 0.043
- Cobalt #1E488F ΔE 0.046
- Dark Grey Blue #29465B ΔE 0.054
- YInMn Blue #415A77 ΔE 0.056
Use #17507A 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.