#131827
Closest named color: Rich Black (#0D1B2A). oklch(21.2% 0.031 269.5), rgb(19, 24, 39).
Aa
White text reads best on this color (17.68:1).
About this color
#131827 is a very dark, muted blue. In OKLCH its lightness is 21%, its chroma 0.031 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.013 away. White text reads best on it, at 17.68:1.
| Hue family | Blues |
| Lightness | very dark (21%) |
| Chroma | muted (0.031) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.18:1 |
| White text | 17.68:1 |
Values
| HEX | #131827 |
| RGB | rgb(19, 24, 39) |
| HSL | hsl(225, 34%, 11%) |
| OKLCH | oklch(21.2% 0.031 269.5) |
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 #131827 | 17.68:1 | AAA | Lc -106.7 | Preferred for body text |
| Black text on #131827 | 1.18:1 | Fails | Lc 0.0 | Not readable |
| #131827 text on white | 17.68:1 | AAA | Lc 104.5 | Preferred for body text |
| #131827 text on black | 1.18:1 | 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
#E7EAF1
oklch(93.7% 0.01 267.4)
-
Step 200
200
#D4D9E7
oklch(88.6% 0.02 270.2)
-
Step 300
300
#B7C0D9
oklch(80.9% 0.037 269.8)
-
Step 400
400
#92A0C6
oklch(70.8% 0.058 269.1)
-
Step 500
500
#7788B7
oklch(63.1% 0.074 268.9)
-
Step 600
600
#6071A3
oklch(55.6% 0.081 269.3)
-
Step 700
700
#505E8C
oklch(49% 0.076 270.5)
-
Step 800
800
#414D72
oklch(42.6% 0.064 269.8)
-
Step 900
900
#37405C
oklch(37.6% 0.05 270.2)
-
Step 950
950 (this color)
#131827
oklch(21.2% 0.031 269.5)
#131827 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) | #131928 | 0.004 |
| Deuteranopia (no green cones) | #111827 | 0.003 |
| Tritanopia (no blue cones) | #0C1B1D | 0.028 |
| Achromatopsia (no color) | #181818 | 0.031 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #131827
#131827
oklch(21.2% 0.031 269.5)
- #1E1807
#1E1807
oklch(21.1% 0.031 90.5)
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 #131827, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.013
- Dark #1B2431 ΔE 0.047
- Rich Navy #001219 ΔE 0.049
- Jet #212529 ΔE 0.055
- Oxford Blue #1B263B ΔE 0.059
- Almost Black #070D0D ΔE 0.066
- Navy Blue #001146 ΔE 0.072
- Midnight Purple #280137 ΔE 0.082
Use #131827 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.