#171E30
Closest named color: Rich Black (#0D1B2A). oklch(23.8% 0.036 267.4), rgb(23, 30, 48).
Aa
White text reads best on this color (16.60:1).
About this color
#171E30 is a very dark, muted blue. In OKLCH its lightness is 24%, its chroma 0.036 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.022 away. White text reads best on it, at 16.60:1.
| Hue family | Blues |
| Lightness | very dark (24%) |
| Chroma | muted (0.036) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.26:1 |
| White text | 16.60:1 |
Values
| HEX | #171E30 |
| RGB | rgb(23, 30, 48) |
| HSL | hsl(223, 35%, 14%) |
| OKLCH | oklch(23.8% 0.036 267.4) |
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 #171E30 | 16.60:1 | AAA | Lc -106.0 | Preferred for body text |
| Black text on #171E30 | 1.26:1 | Fails | Lc 0.0 | Not readable |
| #171E30 text on white | 16.60:1 | AAA | Lc 103.5 | Preferred for body text |
| #171E30 text on black | 1.26:1 | Fails | Lc 0.0 | 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 950.
-
Step 50
50
#F4F5F9
oklch(97.1% 0.005 275)
-
Step 100
100
#E6EAF2
oklch(93.6% 0.012 264.5)
-
Step 200
200
#D2D9EA
oklch(88.5% 0.025 267.9)
-
Step 300
300
#B4C0DD
oklch(80.8% 0.043 267.6)
-
Step 400
400
#8EA0CC
oklch(70.8% 0.068 267.3)
-
Step 500
500
#7288BF
oklch(63.2% 0.087 267.2)
-
Step 600
600
#5A71AC
oklch(55.6% 0.096 267.1)
-
Step 700
700
#4A5E93
oklch(49% 0.089 267.4)
-
Step 800
800
#3D4D78
oklch(42.7% 0.075 267.7)
-
Step 900
900
#344060
oklch(37.6% 0.057 267.9)
-
Step 950
950 (this color)
#171E30
oklch(23.8% 0.036 267.4)
#171E30 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) | #182031 | 0.007 |
| Deuteranopia (no green cones) | #151D30 | 0.005 |
| Tritanopia (no blue cones) | #0E2224 | 0.034 |
| Achromatopsia (no color) | #1E1E1E | 0.036 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #171E30
#171E30
oklch(23.8% 0.036 267.4)
- #261E09
#261E09
oklch(23.9% 0.036 88.6)
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 #171E30, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.022
- Dark #1B2431 ΔE 0.023
- Oxford Blue #1B263B ΔE 0.032
- Jet #212529 ΔE 0.037
- Space Cadet #2B2D42 ΔE 0.068
- Navy Blue #001146 ΔE 0.071
- Rich Navy #001219 ΔE 0.073
- Gunmetal #293241 ΔE 0.078
Use #171E30 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.