#05171F
Closest named color: Rich Navy (#001219). oklch(19.3% 0.029 228.8), rgb(5, 23, 31).
Aa
White text reads best on this color (18.27:1).
About this color
#05171F is a very dark close to neutral grey. In OKLCH its lightness is 19%, its chroma 0.029. It has too little chroma to lean warm or cool. The nearest named color is Rich Navy (#001219), ΔE 0.025 away. White text reads best on it, at 18.27:1.
| Hue family | Neutrals |
| Lightness | very dark (19%) |
| Chroma | close to neutral grey (0.029) |
| Temperature | neutral |
| Nearest name | Rich Navy (#001219) |
| Black text | 1.14:1 |
| White text | 18.27:1 |
Values
| HEX | #05171F |
| RGB | rgb(5, 23, 31) |
| HSL | hsl(198, 72%, 7%) |
| OKLCH | oklch(19.3% 0.029 228.8) |
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 #05171F | 18.27:1 | AAA | Lc -107.0 | Preferred for body text |
| Black text on #05171F | 1.14:1 | Fails | Lc 0.0 | Not readable |
| #05171F text on white | 18.27:1 | AAA | Lc 104.9 | Preferred for body text |
| #05171F text on black | 1.14:1 | 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
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E3EBEF
oklch(93.5% 0.01 228.9)
-
Step 200
200
#CDDCE3
oklch(88.5% 0.019 227.3)
-
Step 300
300
#AAC5D3
oklch(80.8% 0.035 230.3)
-
Step 400
400
#7CA8BC
oklch(70.7% 0.056 227.7)
-
Step 500
500
#5992AC
oklch(63.1% 0.071 228.9)
-
Step 600
600
#3D7C97
oklch(55.6% 0.077 228.5)
-
Step 700
700
#2F6881
oklch(49% 0.072 229.4)
-
Step 800
800
#285569
oklch(42.7% 0.059 229.4)
-
Step 900
900
#254655
oklch(37.6% 0.046 229.2)
-
Step 950
950 (this color)
#05171F
oklch(19.3% 0.029 228.8)
#05171F 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) | #13161F | 0.021 |
| Deuteranopia (no green cones) | #0F141F | 0.018 |
| Tritanopia (no blue cones) | #00191A | 0.017 |
| Achromatopsia (no color) | #151515 | 0.029 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #05171F
#05171F
oklch(19.3% 0.029 228.8)
- #1F1008
#1F1008
oklch(19.2% 0.03 48.8)
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 #05171F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Navy #001219 ΔE 0.025
- Rich Black #0D1B2A ΔE 0.028
- Almost Black #070D0D ΔE 0.046
- Dark #1B2431 ΔE 0.066
- Jet #212529 ΔE 0.072
- Oxford Blue #1B263B ΔE 0.080
- Dark Navy #000435 ΔE 0.081
- Navy Blue #001146 ΔE 0.081
Use #05171F 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.