#03101B
Closest named color: Rich Navy (#001219). oklch(16.7% 0.031 242.9), rgb(3, 16, 27).
Aa
White text reads best on this color (19.19:1).
About this color
#03101B is a very dark, muted blue. In OKLCH its lightness is 17%, its chroma 0.031 and its hue 243°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Navy (#001219), ΔE 0.011 away. White text reads best on it, at 19.19:1.
| Hue family | Blues |
| Lightness | very dark (17%) |
| Chroma | muted (0.031) |
| Temperature | cool |
| Nearest name | Rich Navy (#001219) |
| Black text | 1.09:1 |
| White text | 19.19:1 |
Values
| HEX | #03101B |
| RGB | rgb(3, 16, 27) |
| HSL | hsl(208, 80%, 6%) |
| OKLCH | oklch(16.7% 0.031 242.9) |
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 #03101B | 19.19:1 | AAA | Lc -107.5 | Preferred for body text |
| Black text on #03101B | 1.09:1 | Fails | Lc 0.0 | Not readable |
| #03101B text on white | 19.19:1 | AAA | Lc 105.5 | Preferred for body text |
| #03101B text on black | 1.09:1 | 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
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E4EBF1
oklch(93.6% 0.011 243.7)
-
Step 200
200
#CEDBE6
oklch(88.5% 0.021 243.4)
-
Step 300
300
#ADC4D7
oklch(80.9% 0.037 243.1)
-
Step 400
400
#81A6C3
oklch(70.8% 0.059 242.2)
-
Step 500
500
#608FB4
oklch(63.1% 0.076 243.1)
-
Step 600
600
#4679A0
oklch(55.7% 0.082 243.1)
-
Step 700
700
#376689
oklch(49.3% 0.076 242.7)
-
Step 800
800
#2E536F
oklch(42.7% 0.063 242.8)
-
Step 900
900
#29455A
oklch(37.8% 0.05 242.1)
-
Step 950
950 (this color)
#03101B
oklch(16.7% 0.031 242.9)
#03101B 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) | #0B101B | 0.015 |
| Deuteranopia (no green cones) | #080E1B | 0.011 |
| Tritanopia (no blue cones) | #001314 | 0.023 |
| Achromatopsia (no color) | #0F0F0F | 0.031 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #03101B
#03101B
oklch(16.7% 0.031 242.9)
- #180B02
#180B02
oklch(16.6% 0.031 61.8)
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 #03101B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Navy #001219 ΔE 0.011
- Almost Black #070D0D ΔE 0.029
- Rich Black #0D1B2A ΔE 0.052
- Dark Navy Blue #00022E ΔE 0.066
- Midnight #03012D ΔE 0.067
- Dark Navy #000435 ΔE 0.068
- Very Dark Blue #000133 ΔE 0.073
- Very Dark Brown #1D0200 ΔE 0.084
Use #03101B 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.