#03172A
Closest named color: Rich Black (#0D1B2A). oklch(20% 0.047 248.5), rgb(3, 23, 42).
Aa
White text reads best on this color (18.10:1).
About this color
#03172A is a very dark, muted blue. In OKLCH its lightness is 20%, its chroma 0.047 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.021 away. White text reads best on it, at 18.10:1.
| Hue family | Blues |
| Lightness | very dark (20%) |
| Chroma | muted (0.047) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.15:1 |
| White text | 18.10:1 |
Values
| HEX | #03172A |
| RGB | rgb(3, 23, 42) |
| HSL | hsl(209, 87%, 9%) |
| OKLCH | oklch(20% 0.047 248.5) |
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 #03172A | 18.10:1 | AAA | Lc -106.8 | Preferred for body text |
| Black text on #03172A | 1.15:1 | Fails | Lc 0.0 | Not readable |
| #03172A text on white | 18.10:1 | AAA | Lc 104.7 | Preferred for body text |
| #03172A text on black | 1.15:1 | 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
#E2EBF4
oklch(93.6% 0.016 248)
-
Step 200
200
#CADBED
oklch(88.4% 0.031 249.7)
-
Step 300
300
#A5C4E4
oklch(80.8% 0.056 249.4)
-
Step 400
400
#74A5D6
oklch(70.6% 0.089 249.2)
-
Step 500
500
#4D8ECB
oklch(63% 0.114 248.7)
-
Step 600
600
#2E77B8
oklch(55.5% 0.124 248.9)
-
Step 700
700
#1F649E
oklch(49.1% 0.115 248.4)
-
Step 800
800
#1D5280
oklch(42.7% 0.094 248.4)
-
Step 900
900
#1E4467
oklch(37.7% 0.074 248.7)
-
Step 950
950 (this color)
#03172A
oklch(20% 0.047 248.5)
#03172A 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) | #0E182B | 0.016 |
| Deuteranopia (no green cones) | #08142A | 0.012 |
| Tritanopia (no blue cones) | #001C1E | 0.035 |
| Achromatopsia (no color) | #161616 | 0.047 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #03172A
#03172A
oklch(20% 0.047 248.5)
- #231200
#231200
oklch(20.2% 0.044 69)
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 #03172A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.021
- Rich Navy #001219 ΔE 0.038
- Navy Blue #001146 ΔE 0.059
- Dark #1B2431 ΔE 0.062
- Almost Black #070D0D ΔE 0.063
- Dark Navy #000435 ΔE 0.065
- Oxford Blue #1B263B ΔE 0.071
- Jet #212529 ΔE 0.073
Use #03172A 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.