#031023
Closest named color: Rich Navy (#001219). oklch(17.3% 0.045 255.3), rgb(3, 16, 35).
Aa
White text reads best on this color (19.05:1).
About this color
#031023 is a very dark, muted blue. In OKLCH its lightness is 17%, its chroma 0.045 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Navy (#001219), ΔE 0.025 away. White text reads best on it, at 19.05:1.
| Hue family | Blues |
| Lightness | very dark (17%) |
| Chroma | muted (0.045) |
| Temperature | cool |
| Nearest name | Rich Navy (#001219) |
| Black text | 1.10:1 |
| White text | 19.05:1 |
Values
| HEX | #031023 |
| RGB | rgb(3, 16, 35) |
| HSL | hsl(216, 84%, 7%) |
| OKLCH | oklch(17.3% 0.045 255.3) |
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 #031023 | 19.05:1 | AAA | Lc -107.4 | Preferred for body text |
| Black text on #031023 | 1.10:1 | Fails | Lc 0.0 | Not readable |
| #031023 text on white | 19.05:1 | AAA | Lc 105.3 | Preferred for body text |
| #031023 text on black | 1.10:1 | 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
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E3EBF4
oklch(93.7% 0.015 251.2)
-
Step 200
200
#CDDAED
oklch(88.4% 0.03 257.8)
-
Step 300
300
#AAC3E3
oklch(80.9% 0.053 254.7)
-
Step 400
400
#7DA3D5
oklch(70.7% 0.085 255.5)
-
Step 500
500
#5B8CCA
oklch(63.2% 0.108 254.9)
-
Step 600
600
#4075B7
oklch(55.7% 0.118 254.9)
-
Step 700
700
#32629D
oklch(49.2% 0.109 254.8)
-
Step 800
800
#2A5080
oklch(42.8% 0.091 255.2)
-
Step 900
900
#274366
oklch(37.8% 0.069 254.8)
-
Step 950
950 (this color)
#031023
oklch(17.3% 0.045 255.3)
#031023 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) | #071224 | 0.011 |
| Deuteranopia (no green cones) | #030E23 | 0.007 |
| Tritanopia (no blue cones) | #001417 | 0.034 |
| Achromatopsia (no color) | #101010 | 0.045 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #031023
#031023
oklch(17.3% 0.045 255.3)
- #190D00
#190D00
oklch(17.2% 0.036 74.5)
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 #031023, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Navy #001219 ΔE 0.025
- Almost Black #070D0D ΔE 0.045
- Rich Black #0D1B2A ΔE 0.046
- Dark Navy #000435 ΔE 0.053
- Dark Navy Blue #00022E ΔE 0.055
- Midnight #03012D ΔE 0.056
- Very Dark Blue #000133 ΔE 0.060
- Navy Blue #001146 ΔE 0.069
Use #031023 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.