#003685
Closest named color: Twilight Blue (#0A437A). oklch(35.7% 0.143 259.6), rgb(0, 54, 133).
Aa
White text reads best on this color (11.25:1).
About this color
#003685 is a dark, vivid blue. In OKLCH its lightness is 36%, its chroma 0.143 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.044 away. White text reads best on it, at 11.25:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | vivid (0.143) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 1.86:1 |
| White text | 11.25:1 |
Values
| HEX | #003685 |
| RGB | rgb(0, 54, 133) |
| HSL | hsl(216, 100%, 26%) |
| OKLCH | oklch(35.7% 0.143 259.6) |
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 #003685 | 11.25:1 | AAA | Lc -99.0 | Preferred for body text |
| Black text on #003685 | 1.86:1 | Fails | Lc 8.7 | Not readable |
| #003685 text on white | 11.25:1 | AAA | Lc 95.2 | Preferred for body text |
| #003685 text on black | 1.86:1 | Fails | Lc -7.5 | 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 900.
-
Step 50
50
#F0F6FF
oklch(97.1% 0.014 258.3)
-
Step 100
100
#DEEBFF
oklch(93.6% 0.031 258.9)
-
Step 200
200
#C4DBFF
oklch(88.6% 0.056 259.3)
-
Step 300
300
#9CC2FF
oklch(80.9% 0.096 259.7)
-
Step 400
400
#64A0FF
oklch(70.8% 0.153 259.2)
-
Step 500
500
#3684FF
oklch(63.2% 0.199 259.4)
-
Step 600
600
#0068F1
oklch(55.5% 0.221 259.6)
-
Step 700
700
#0057CD
oklch(49.1% 0.196 259.6)
-
Step 800
800
#0047AA
oklch(42.8% 0.171 259.6)
-
Step 900
900 (this color)
#003685
oklch(35.7% 0.143 259.6)
-
Step 950
950
#072451
oklch(27% 0.089 259.3)
#003685 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) | #004188 | 0.031 |
| Deuteranopia (no green cones) | #003583 | 0.004 |
| Tritanopia (no blue cones) | #004A58 | 0.107 |
| Achromatopsia (no color) | #3B3B3B | 0.143 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #003685
#003685
oklch(35.7% 0.143 259.6)
- #513700
#513700
oklch(35.8% 0.074 79.2)
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 #003685, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.044
- Marine Blue #01386A ΔE 0.047
- Cobalt #1E488F ΔE 0.059
- Royal #0C1793 ΔE 0.064
- Marine #042E60 ΔE 0.067
- Sapphire #2138AB ΔE 0.069
- Midnight Blue #191970 ΔE 0.077
- Light Navy #155084 ΔE 0.078
Use #003685 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.