#101133
Closest named color: Rich Black (#0D1B2A). oklch(20.1% 0.066 277.4), rgb(16, 17, 51).
Aa
White text reads best on this color (18.26:1).
About this color
#101133 is a very dark, muted blue. In OKLCH its lightness is 20%, its chroma 0.066 and its hue 277°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.041 away. White text reads best on it, at 18.26:1.
| Hue family | Blues |
| Lightness | very dark (20%) |
| Chroma | muted (0.066) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.15:1 |
| White text | 18.26:1 |
Values
| HEX | #101133 |
| RGB | rgb(16, 17, 51) |
| HSL | hsl(238, 52%, 13%) |
| OKLCH | oklch(20.1% 0.066 277.4) |
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 #101133 | 18.26:1 | AAA | Lc -106.9 | Preferred for body text |
| Black text on #101133 | 1.15:1 | Fails | Lc 0.0 | Not readable |
| #101133 text on white | 18.26:1 | AAA | Lc 104.8 | Preferred for body text |
| #101133 text on black | 1.15:1 | 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
#F3F5FD
oklch(97.1% 0.011 274.9)
-
Step 100
100
#E6E9F9
oklch(93.6% 0.022 277.5)
-
Step 200
200
#D2D7F6
oklch(88.5% 0.043 278.2)
-
Step 300
300
#B4BCF3
oklch(80.8% 0.078 278.1)
-
Step 400
400
#8E98ED
oklch(70.7% 0.124 277.6)
-
Step 500
500
#747CE7
oklch(63% 0.159 277.6)
-
Step 600
600
#5E63D5
oklch(55.6% 0.172 277.3)
-
Step 700
700
#4E51B9
oklch(49.1% 0.161 277.5)
-
Step 800
800
#404396
oklch(42.8% 0.133 277.6)
-
Step 900
900
#353977
oklch(37.6% 0.104 277.4)
-
Step 950
950 (this color)
#101133
oklch(20.1% 0.066 277.4)
#101133 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) | #001634 | 0.026 |
| Deuteranopia (no green cones) | #001432 | 0.025 |
| Tritanopia (no blue cones) | #01191F | 0.058 |
| Achromatopsia (no color) | #151515 | 0.066 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #101133
#101133
oklch(20.1% 0.066 277.4)
- #1B1600
#1B1600
oklch(20% 0.041 98.4)
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 #101133, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.041
- Navy Blue #001146 ΔE 0.043
- Dark Navy #000435 ΔE 0.054
- Night Blue #040348 ΔE 0.057
- Rich Navy #001219 ΔE 0.063
- Midnight Purple #280137 ΔE 0.063
- Midnight #03012D ΔE 0.063
- Very Dark Blue #000133 ΔE 0.064
Use #101133 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.