#101F34
Closest named color: Rich Black (#0D1B2A). oklch(23.8% 0.046 257), rgb(16, 31, 52).
Aa
White text reads best on this color (16.56:1).
About this color
#101F34 is a very dark, muted blue. In OKLCH its lightness is 24%, its chroma 0.046 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.023 away. White text reads best on it, at 16.56:1.
| Hue family | Blues |
| Lightness | very dark (24%) |
| Chroma | muted (0.046) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.26:1 |
| White text | 16.56:1 |
Values
| HEX | #101F34 |
| RGB | rgb(16, 31, 52) |
| HSL | hsl(215, 53%, 13%) |
| OKLCH | oklch(23.8% 0.046 257) |
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 #101F34 | 16.56:1 | AAA | Lc -105.9 | Preferred for body text |
| Black text on #101F34 | 1.26:1 | Fails | Lc 0.0 | Not readable |
| #101F34 text on white | 16.56:1 | AAA | Lc 103.4 | Preferred for body text |
| #101F34 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
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E3EAF5
oklch(93.5% 0.017 259.4)
-
Step 200
200
#CDDAED
oklch(88.4% 0.03 257.8)
-
Step 300
300
#ABC2E4
oklch(80.8% 0.054 258)
-
Step 400
400
#7EA3D6
oklch(70.8% 0.086 256.5)
-
Step 500
500
#5D8BCC
oklch(63.2% 0.111 257.1)
-
Step 600
600
#4274B8
oklch(55.6% 0.119 256.6)
-
Step 700
700
#34619F
oklch(49.2% 0.112 256.9)
-
Step 800
800
#2C4F81
oklch(42.7% 0.093 257.5)
-
Step 900
900
#284267
oklch(37.7% 0.071 257.3)
-
Step 950
950 (this color)
#101F34
oklch(23.8% 0.046 257)
#101F34 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) | #162035 | 0.010 |
| Deuteranopia (no green cones) | #121D34 | 0.007 |
| Tritanopia (no blue cones) | #002427 | 0.039 |
| Achromatopsia (no color) | #1F1F1F | 0.046 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #101F34
#101F34
oklch(23.8% 0.046 257)
- #2B1B03
#2B1B03
oklch(23.7% 0.045 74.8)
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 #101F34, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.023
- Dark #1B2431 ΔE 0.027
- Oxford Blue #1B263B ΔE 0.032
- Jet #212529 ΔE 0.044
- Navy Blue #001146 ΔE 0.063
- Space Cadet #2B2D42 ΔE 0.070
- Rich Navy #001219 ΔE 0.074
- Gunmetal #293241 ΔE 0.079
Use #101F34 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.