#0440A0
Closest named color: Sapphire (#2138AB). oklch(40.4% 0.166 260.6), rgb(4, 64, 160).
Aa
White text reads best on this color (9.34:1).
About this color
#0440A0 is a dark, vivid blue. In OKLCH its lightness is 40%, its chroma 0.166 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Sapphire (#2138AB), ΔE 0.029 away. White text reads best on it, at 9.34:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | vivid (0.166) |
| Temperature | cool |
| Nearest name | Sapphire (#2138AB) |
| Black text | 2.24:1 |
| White text | 9.34:1 |
Values
| HEX | #0440A0 |
| RGB | rgb(4, 64, 160) |
| HSL | hsl(217, 95%, 32%) |
| OKLCH | oklch(40.4% 0.166 260.6) |
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 #0440A0 | 9.34:1 | AAA | Lc -95.1 | Preferred for body text |
| Black text on #0440A0 | 2.24:1 | Fails | Lc 13.2 | Not readable |
| #0440A0 text on white | 9.34:1 | AAA | Lc 90.7 | Preferred for body text |
| #0440A0 text on black | 2.24:1 | Fails | Lc -11.6 | 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 800.
-
Step 50
50
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#DFEBFD
oklch(93.6% 0.028 258.4)
-
Step 200
200
#C5DAFD
oklch(88.4% 0.054 260.6)
-
Step 300
300
#9DC2FF
oklch(81% 0.096 260.2)
-
Step 400
400
#679FFF
oklch(70.7% 0.153 260.6)
-
Step 500
500
#3C83FF
oklch(63.2% 0.198 260.7)
-
Step 600
600
#1868EE
oklch(55.6% 0.215 260.7)
-
Step 700
700
#0856CF
oklch(49.2% 0.199 260.5)
-
Step 800
800 (this color)
#0440A0
oklch(40.4% 0.166 260.6)
-
Step 900
900
#133D85
oklch(37.7% 0.13 260.6)
-
Step 950
950
#0D244E
oklch(27% 0.083 261.2)
#0440A0 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) | #004EA3 | 0.037 |
| Deuteranopia (no green cones) | #00409E | 0.004 |
| Tritanopia (no blue cones) | #005969 | 0.127 |
| Achromatopsia (no color) | #474747 | 0.166 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0440A0
#0440A0
oklch(40.4% 0.166 260.6)
- #604300
#604300
oklch(40.5% 0.084 80.6)
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 #0440A0, closest first.
No curated palette has a color within ΔE 0.04 of #0440A0.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sapphire #2138AB ΔE 0.029
- Cobalt #1E488F ΔE 0.040
- Twilight Blue #0A437A ΔE 0.065
- Blue Blue #2242C7 ΔE 0.067
- Blueberry #464196 ΔE 0.067
- Light Navy #155084 ΔE 0.068
- Dusk Blue #26538D ΔE 0.069
- Dark Slate Blue #483D8B ΔE 0.076
Use #0440A0 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.