#0A1537
Closest named color: Navy Blue (#001146). oklch(21% 0.068 266.9), rgb(10, 21, 55).
Aa
White text reads best on this color (17.86:1).
About this color
#0A1537 is a very dark, muted blue. In OKLCH its lightness is 21%, its chroma 0.068 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is Navy Blue (#001146), ΔE 0.035 away. White text reads best on it, at 17.86:1.
| Hue family | Blues |
| Lightness | very dark (21%) |
| Chroma | muted (0.068) |
| Temperature | cool |
| Nearest name | Navy Blue (#001146) |
| Black text | 1.17:1 |
| White text | 17.86:1 |
Values
| HEX | #0A1537 |
| RGB | rgb(10, 21, 55) |
| HSL | hsl(225, 69%, 13%) |
| OKLCH | oklch(21% 0.068 266.9) |
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 #0A1537 | 17.86:1 | AAA | Lc -106.7 | Preferred for body text |
| Black text on #0A1537 | 1.17:1 | Fails | Lc 0.0 | Not readable |
| #0A1537 text on white | 17.86:1 | AAA | Lc 104.5 | Preferred for body text |
| #0A1537 text on black | 1.17:1 | 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
#F2F5FD
oklch(97% 0.011 269.6)
-
Step 100
100
#E3EAFA
oklch(93.6% 0.023 266.9)
-
Step 200
200
#CCD9F8
oklch(88.5% 0.045 267.4)
-
Step 300
300
#A9C0F6
oklch(81% 0.081 266.7)
-
Step 400
400
#7C9DF1
oklch(70.7% 0.129 266.8)
-
Step 500
500
#5C82EC
oklch(63.1% 0.165 266.8)
-
Step 600
600
#4469DB
oklch(55.7% 0.179 266.9)
-
Step 700
700
#3656BE
oklch(49% 0.168 267)
-
Step 800
800
#2D479A
oklch(42.7% 0.139 267.2)
-
Step 900
900
#283D7A
oklch(37.8% 0.107 266.9)
-
Step 950
950 (this color)
#0A1537
oklch(21% 0.068 266.9)
#0A1537 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) | #021A38 | 0.017 |
| Deuteranopia (no green cones) | #001536 | 0.015 |
| Tritanopia (no blue cones) | #001D23 | 0.055 |
| Achromatopsia (no color) | #171717 | 0.068 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0A1537
#0A1537
oklch(21% 0.068 266.9)
- #211700
#211700
oklch(21.1% 0.043 87.4)
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 #0A1537, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Navy Blue #001146 ΔE 0.035
- Rich Black #0D1B2A ΔE 0.036
- Night Blue #040348 ΔE 0.055
- Dark Navy #000435 ΔE 0.057
- Dark #1B2431 ΔE 0.063
- Rich Navy #001219 ΔE 0.065
- Oxford Blue #1B263B ΔE 0.065
- Dark Indigo #1F0954 ΔE 0.068
Use #0A1537 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.