#100F35
Closest named color: Navy Blue (#001146). oklch(19.8% 0.072 278.7), rgb(16, 15, 53).
Aa
White text reads best on this color (18.39:1).
About this color
#100F35 is a very dark, moderately saturated blue. In OKLCH its lightness is 20%, its chroma 0.072 and its hue 279°. Its hue sits on the cool side of the wheel. The nearest named color is Navy Blue (#001146), ΔE 0.040 away. White text reads best on it, at 18.39:1.
| Hue family | Blues |
| Lightness | very dark (20%) |
| Chroma | moderately saturated (0.072) |
| Temperature | cool |
| Nearest name | Navy Blue (#001146) |
| Black text | 1.14:1 |
| White text | 18.39:1 |
Values
| HEX | #100F35 |
| RGB | rgb(16, 15, 53) |
| HSL | hsl(242, 56%, 13%) |
| OKLCH | oklch(19.8% 0.072 278.7) |
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 #100F35 | 18.39:1 | AAA | Lc -107.0 | Preferred for body text |
| Black text on #100F35 | 1.14:1 | Fails | Lc 0.0 | Not readable |
| #100F35 text on white | 18.39:1 | AAA | Lc 104.8 | Preferred for body text |
| #100F35 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
#F3F5FD
oklch(97.1% 0.011 274.9)
-
Step 100
100
#E6E9FB
oklch(93.7% 0.024 278.4)
-
Step 200
200
#D2D7F9
oklch(88.6% 0.047 278.8)
-
Step 300
300
#B4BCF8
oklch(81% 0.085 278.4)
-
Step 400
400
#8E96F4
oklch(70.6% 0.137 278.6)
-
Step 500
500
#7579F0
oklch(63.1% 0.175 278.7)
-
Step 600
600
#605EDF
oklch(55.6% 0.191 278.9)
-
Step 700
700
#4F4DC1
oklch(49.1% 0.176 278.4)
-
Step 800
800
#41409C
oklch(42.7% 0.146 278.7)
-
Step 900
900
#36377C
oklch(37.6% 0.114 278.7)
-
Step 950
950 (this color)
#100F35
oklch(19.8% 0.072 278.7)
#100F35 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) | #001636 | 0.029 |
| Deuteranopia (no green cones) | #001334 | 0.026 |
| Tritanopia (no blue cones) | #001820 | 0.061 |
| Achromatopsia (no color) | #141414 | 0.073 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #100F35
#100F35
oklch(19.8% 0.072 278.7)
- #1A1600
#1A1600
oklch(19.9% 0.041 100.7)
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 #100F35, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Navy Blue #001146 ΔE 0.040
- Rich Black #0D1B2A ΔE 0.048
- Dark Navy #000435 ΔE 0.049
- Night Blue #040348 ΔE 0.051
- Midnight #03012D ΔE 0.059
- Very Dark Blue #000133 ΔE 0.060
- Midnight Purple #280137 ΔE 0.060
- Dark Navy Blue #00022E ΔE 0.061
Use #100F35 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.