#001E37
Closest named color: Rich Black (#0D1B2A). oklch(22.9% 0.06 247.1), rgb(0, 30, 55).
Aa
White text reads best on this color (16.92:1).
About this color
#001E37 is a very dark, muted blue. In OKLCH its lightness is 23%, its chroma 0.060 and its hue 247°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.027 away. White text reads best on it, at 16.92:1.
| Hue family | Blues |
| Lightness | very dark (23%) |
| Chroma | muted (0.060) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.24:1 |
| White text | 16.92:1 |
Values
| HEX | #001E37 |
| RGB | rgb(0, 30, 55) |
| HSL | hsl(207, 100%, 11%) |
| OKLCH | oklch(22.9% 0.06 247.1) |
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 #001E37 | 16.92:1 | AAA | Lc -106.0 | Preferred for body text |
| Black text on #001E37 | 1.24:1 | Fails | Lc 0.0 | Not readable |
| #001E37 text on white | 16.92:1 | AAA | Lc 103.6 | Preferred for body text |
| #001E37 text on black | 1.24:1 | 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
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#DFECF7
oklch(93.7% 0.02 243.4)
-
Step 200
200
#C5DCF3
oklch(88.5% 0.04 248.3)
-
Step 300
300
#9CC6ED
oklch(81% 0.071 246.8)
-
Step 400
400
#62A7E4
oklch(70.8% 0.114 246.9)
-
Step 500
500
#2D8FDC
oklch(63.1% 0.146 247)
-
Step 600
600
#0078C3
oklch(55.7% 0.146 246.8)
-
Step 700
700
#0064A5
oklch(49% 0.13 247.2)
-
Step 800
800
#005289
oklch(42.7% 0.113 247.3)
-
Step 900
900
#064471
oklch(37.6% 0.096 247.4)
-
Step 950
950 (this color)
#001E37
oklch(22.9% 0.06 247.1)
#001E37 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) | #121F38 | 0.022 |
| Deuteranopia (no green cones) | #081A37 | 0.015 |
| Tritanopia (no blue cones) | #002427 | 0.043 |
| Achromatopsia (no color) | #1D1D1D | 0.060 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #001E37
#001E37
oklch(22.9% 0.06 247.1)
- #2C1700
#2C1700
oklch(22.9% 0.051 66.9)
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 #001E37, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.027
- Dark #1B2431 ΔE 0.044
- Oxford Blue #1B263B ΔE 0.046
- Navy Blue #001146 ΔE 0.050
- Jet #212529 ΔE 0.061
- Rich Navy #001219 ΔE 0.069
- Night Blue #040348 ΔE 0.077
- Dark Navy #000435 ΔE 0.081
Use #001E37 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.