#101F36
Closest named color: Rich Black (#0D1B2A). oklch(23.9% 0.049 258.7), rgb(16, 31, 54).
Aa
White text reads best on this color (16.51:1).
About this color
#101F36 is a very dark, muted blue. In OKLCH its lightness is 24%, its chroma 0.049 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.026 away. White text reads best on it, at 16.51:1.
| Hue family | Blues |
| Lightness | very dark (24%) |
| Chroma | muted (0.049) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.27:1 |
| White text | 16.51:1 |
Values
| HEX | #101F36 |
| RGB | rgb(16, 31, 54) |
| HSL | hsl(216, 54%, 14%) |
| OKLCH | oklch(23.9% 0.049 258.7) |
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 #101F36 | 16.51:1 | AAA | Lc -105.8 | Preferred for body text |
| Black text on #101F36 | 1.27:1 | Fails | Lc 0.0 | Not readable |
| #101F36 text on white | 16.51:1 | AAA | Lc 103.4 | Preferred for body text |
| #101F36 text on black | 1.27:1 | 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
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E3EAF5
oklch(93.5% 0.017 259.4)
-
Step 200
200
#CDDAEF
oklch(88.5% 0.032 260)
-
Step 300
300
#AAC2E7
oklch(80.9% 0.059 259)
-
Step 400
400
#7DA2DB
oklch(70.7% 0.093 258.8)
-
Step 500
500
#5C8AD1
oklch(63.2% 0.119 258.8)
-
Step 600
600
#4172BE
oklch(55.5% 0.13 258.9)
-
Step 700
700
#3360A4
oklch(49.2% 0.12 258.5)
-
Step 800
800
#2B4E85
oklch(42.6% 0.1 259.1)
-
Step 900
900
#27426A
oklch(37.8% 0.076 258.1)
-
Step 950
950 (this color)
#101F36
oklch(23.9% 0.049 258.7)
#101F36 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) | #152137 | 0.011 |
| Deuteranopia (no green cones) | #101D36 | 0.007 |
| Tritanopia (no blue cones) | #002427 | 0.042 |
| Achromatopsia (no color) | #1F1F1F | 0.049 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #101F36
#101F36
oklch(23.9% 0.049 258.7)
- #2B1C00
#2B1C00
oklch(23.9% 0.049 80.6)
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 #101F36, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.026
- Dark #1B2431 ΔE 0.028
- Oxford Blue #1B263B ΔE 0.031
- Jet #212529 ΔE 0.046
- Navy Blue #001146 ΔE 0.061
- Space Cadet #2B2D42 ΔE 0.069
- Rich Navy #001219 ΔE 0.076
- Gunmetal #293241 ΔE 0.079
Use #101F36 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.