#101D59
Closest named color: Midnight Blue (#191970). oklch(26.5% 0.109 268.3), rgb(16, 29, 89).
Aa
White text reads best on this color (15.64:1).
About this color
#101D59 is a dark, moderately saturated blue. In OKLCH its lightness is 27%, its chroma 0.109 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Midnight Blue (#191970), ΔE 0.043 away. White text reads best on it, at 15.64:1.
| Hue family | Blues |
| Lightness | dark (27%) |
| Chroma | moderately saturated (0.109) |
| Temperature | cool |
| Nearest name | Midnight Blue (#191970) |
| Black text | 1.34:1 |
| White text | 15.64:1 |
Values
| HEX | #101D59 |
| RGB | rgb(16, 29, 89) |
| HSL | hsl(229, 70%, 21%) |
| OKLCH | oklch(26.5% 0.109 268.3) |
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 #101D59 | 15.64:1 | AAA | Lc -104.9 | Preferred for body text |
| Black text on #101D59 | 1.34:1 | Fails | Lc 0.0 | Not readable |
| #101D59 text on white | 15.64:1 | AAA | Lc 102.2 | Preferred for body text |
| #101D59 text on black | 1.34:1 | 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
#F1F5FF
oklch(97% 0.014 268.5)
-
Step 100
100
#E1EAFF
oklch(93.7% 0.03 267.2)
-
Step 200
200
#C9D9FF
oklch(88.6% 0.055 267.2)
-
Step 300
300
#A6BFFF
oklch(80.9% 0.095 267.8)
-
Step 400
400
#799AFF
oklch(70.6% 0.153 268.6)
-
Step 500
500
#587DFF
oklch(63.1% 0.197 268.3)
-
Step 600
600
#3B5BFF
oklch(55.6% 0.244 268.3)
-
Step 700
700
#2B3BF4
oklch(49.1% 0.266 268.3)
-
Step 800
800
#2334C5
oklch(42.8% 0.22 268.3)
-
Step 900
900
#1E319B
oklch(37.7% 0.172 268.3)
-
Step 950
950 (this color)
#101D59
oklch(26.5% 0.109 268.3)
#101D59 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) | #00275B | 0.028 |
| Deuteranopia (no green cones) | #002058 | 0.016 |
| Tritanopia (no blue cones) | #002D38 | 0.086 |
| Achromatopsia (no color) | #232323 | 0.109 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #101D59
#101D59
oklch(26.5% 0.109 268.3)
- #302300
#302300
oklch(26.4% 0.054 87.8)
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 #101D59, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Midnight Blue #191970 ΔE 0.043
- Dark Indigo #1F0954 ΔE 0.046
- Marine #042E60 ΔE 0.048
- Darkblue #030764 ΔE 0.050
- Navy Blue #001146 ΔE 0.056
- Dark Royal Blue #02066F ΔE 0.058
- Deep Blue #040273 ΔE 0.064
- Oxford Blue #1B263B ΔE 0.067
Use #101D59 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.