#101E3A
Closest named color: Rich Black (#0D1B2A). oklch(23.9% 0.057 262.8), rgb(16, 30, 58).
Aa
White text reads best on this color (16.55:1).
About this color
#101E3A is a very dark, muted blue. In OKLCH its lightness is 24%, its chroma 0.057 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.032 away. White text reads best on it, at 16.55:1.
| Hue family | Blues |
| Lightness | very dark (24%) |
| Chroma | muted (0.057) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.26:1 |
| White text | 16.55:1 |
Values
| HEX | #101E3A |
| RGB | rgb(16, 30, 58) |
| HSL | hsl(220, 57%, 15%) |
| OKLCH | oklch(23.9% 0.057 262.8) |
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 #101E3A | 16.55:1 | AAA | Lc -105.9 | Preferred for body text |
| Black text on #101E3A | 1.26:1 | Fails | Lc 0.0 | Not readable |
| #101E3A text on white | 16.55:1 | AAA | Lc 103.4 | Preferred for body text |
| #101E3A 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
#F2F6FC
oklch(97.2% 0.009 258.3)
-
Step 100
100
#E3EAF7
oklch(93.6% 0.019 263)
-
Step 200
200
#CCDAF3
oklch(88.6% 0.038 262.1)
-
Step 300
300
#AAC1ED
oklch(80.9% 0.067 263.3)
-
Step 400
400
#7CA0E5
oklch(70.7% 0.109 262.8)
-
Step 500
500
#5B87DD
oklch(63.1% 0.139 262.6)
-
Step 600
600
#426FCA
oklch(55.6% 0.15 262.7)
-
Step 700
700
#345CAF
oklch(49.1% 0.14 262.9)
-
Step 800
800
#2B4C8E
oklch(42.8% 0.116 262.6)
-
Step 900
900
#274071
oklch(37.8% 0.09 262.5)
-
Step 950
950 (this color)
#101E3A
oklch(23.9% 0.057 262.8)
#101E3A 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) | #11213B | 0.010 |
| Deuteranopia (no green cones) | #0B1D39 | 0.008 |
| Tritanopia (no blue cones) | #002429 | 0.047 |
| Achromatopsia (no color) | #1F1F1F | 0.057 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #101E3A
#101E3A
oklch(23.9% 0.057 262.8)
- #2A1C00
#2A1C00
oklch(23.8% 0.049 82.5)
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 #101E3A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.032
- Oxford Blue #1B263B ΔE 0.033
- Dark #1B2431 ΔE 0.035
- Jet #212529 ΔE 0.053
- Navy Blue #001146 ΔE 0.053
- Space Cadet #2B2D42 ΔE 0.070
- Dark Indigo #1F0954 ΔE 0.073
- Night Blue #040348 ΔE 0.080
Use #101E3A 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.