#004663
Closest named color: Dark Grey Blue (#29465B). oklch(37.2% 0.078 234.3), rgb(0, 70, 99).
Aa
White text reads best on this color (10.21:1).
About this color
#004663 is a dark, moderately saturated blue. In OKLCH its lightness is 37%, its chroma 0.078 and its hue 234°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.030 away. White text reads best on it, at 10.21:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.078) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.05:1 |
| White text | 10.21:1 |
Values
| HEX | #004663 |
| RGB | rgb(0, 70, 99) |
| HSL | hsl(198, 100%, 19%) |
| OKLCH | oklch(37.2% 0.078 234.3) |
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 #004663 | 10.21:1 | AAA | Lc -97.3 | Preferred for body text |
| Black text on #004663 | 2.05:1 | Fails | Lc 10.7 | Not readable |
| #004663 text on white | 10.21:1 | AAA | Lc 93.2 | Preferred for body text |
| #004663 text on black | 2.05:1 | Fails | Lc -9.3 | 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
#F1F6FA
oklch(97.1% 0.008 241.7)
-
Step 100
100
#E0ECF4
oklch(93.6% 0.017 236.7)
-
Step 200
200
#C5DDEC
oklch(88.4% 0.033 235.2)
-
Step 300
300
#9CC8E1
oklch(81% 0.058 233.3)
-
Step 400
400
#61AAD2
oklch(70.6% 0.094 234.2)
-
Step 500
500
#2894C7
oklch(63.1% 0.12 234.6)
-
Step 600
600
#007DAD
oklch(55.6% 0.117 234.3)
-
Step 700
700
#006992
oklch(49.1% 0.103 234.3)
-
Step 800
800
#005678
oklch(42.7% 0.089 233.9)
-
Step 900
900 (this color)
#004663
oklch(37.2% 0.078 234.3)
-
Step 950
950
#072A3B
oklch(27% 0.05 234.4)
#004663 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) | #384664 | 0.048 |
| Deuteranopia (no green cones) | #2B3D63 | 0.040 |
| Tritanopia (no blue cones) | #004E50 | 0.048 |
| Achromatopsia (no color) | #414141 | 0.078 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #004663
#004663
oklch(37.2% 0.078 234.3)
- #5F3312
#5F3312
oklch(37.1% 0.078 54)
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 #004663, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.030
- Charcoal #264653 ΔE 0.035
- Twilight Blue #0A437A ΔE 0.043
- Dark Blue Grey #1F3B4D ΔE 0.046
- Midnight Green #073B4C ΔE 0.048
- Marine Blue #01386A ΔE 0.049
- Dark Teal #014D4E ΔE 0.049
- Prussian Blue #1D3557 ΔE 0.054
Use #004663 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.