#17405C
Closest named color: Dark Blue Grey (#1F3B4D). oklch(35.7% 0.067 242), rgb(23, 64, 92).
Aa
White text reads best on this color (10.91:1).
About this color
#17405C is a dark, muted blue. In OKLCH its lightness is 36%, its chroma 0.067 and its hue 242°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Blue Grey (#1F3B4D), ΔE 0.027 away. White text reads best on it, at 10.91:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | muted (0.067) |
| Temperature | cool |
| Nearest name | Dark Blue Grey (#1F3B4D) |
| Black text | 1.92:1 |
| White text | 10.91:1 |
Values
| HEX | #17405C |
| RGB | rgb(23, 64, 92) |
| HSL | hsl(204, 60%, 23%) |
| OKLCH | oklch(35.7% 0.067 242) |
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 #17405C | 10.91:1 | AAA | Lc -98.9 | Preferred for body text |
| Black text on #17405C | 1.92:1 | Fails | Lc 8.9 | Not readable |
| #17405C text on white | 10.91:1 | AAA | Lc 95.0 | Preferred for body text |
| #17405C text on black | 1.92:1 | Fails | Lc -7.6 | 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
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E2EBF3
oklch(93.6% 0.015 244.7)
-
Step 200
200
#CADCEA
oklch(88.5% 0.027 241.2)
-
Step 300
300
#A5C5DF
oklch(80.9% 0.05 242.9)
-
Step 400
400
#73A7CE
oklch(70.7% 0.08 241.7)
-
Step 500
500
#4C91C2
oklch(63.2% 0.102 241.7)
-
Step 600
600
#2B7AAE
oklch(55.6% 0.11 241.9)
-
Step 700
700
#1C6696
oklch(49% 0.104 242.5)
-
Step 800
800
#1B5479
oklch(42.8% 0.084 241.5)
-
Step 900
900 (this color)
#17405C
oklch(35.7% 0.067 242)
-
Step 950
950
#122939
oklch(27% 0.042 241)
#17405C 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) | #33405D | 0.032 |
| Deuteranopia (no green cones) | #2A3A5B | 0.025 |
| Tritanopia (no blue cones) | #00474A | 0.047 |
| Achromatopsia (no color) | #3D3D3D | 0.067 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #17405C
#17405C
oklch(35.7% 0.067 242)
- #553313
#553313
oklch(35.6% 0.067 60.9)
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 #17405C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Blue Grey #1F3B4D ΔE 0.027
- Dark Grey Blue #29465B ΔE 0.029
- Charcoal #264653 ΔE 0.033
- Midnight Green #073B4C ΔE 0.034
- Prussian Blue #1D3557 ΔE 0.034
- Marine Blue #01386A ΔE 0.042
- Twilight Blue #0A437A ΔE 0.051
- Onyx #343A40 ΔE 0.055
Use #17405C 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.