#004FAB
Closest named color: Cobalt (#1E488F). oklch(44.6% 0.162 257.6), rgb(0, 79, 171).
Aa
White text reads best on this color (7.75:1).
About this color
#004FAB is a dark, vivid blue. In OKLCH its lightness is 45%, its chroma 0.162 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.048 away. White text reads best on it, at 7.75:1.
| Hue family | Blues |
| Lightness | dark (45%) |
| Chroma | vivid (0.162) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.70:1 |
| White text | 7.75:1 |
Values
| HEX | #004FAB |
| RGB | rgb(0, 79, 171) |
| HSL | hsl(212, 100%, 34%) |
| OKLCH | oklch(44.6% 0.162 257.6) |
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 #004FAB | 7.75:1 | AAA | Lc -90.9 | Preferred for body text |
| Black text on #004FAB | 2.70:1 | Fails | Lc 17.9 | Dividers and decoration only |
| #004FAB text on white | 7.75:1 | AAA | Lc 86.1 | Fine for body text |
| #004FAB text on black | 2.70:1 | Fails | Lc -15.9 | Dividers and decoration only |
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
#F0F6FE
oklch(97.1% 0.012 255.5)
-
Step 100
100
#DFEBFD
oklch(93.6% 0.028 258.4)
-
Step 200
200
#C4DBFC
oklch(88.5% 0.052 257.4)
-
Step 300
300
#9AC3FE
oklch(80.9% 0.095 257.4)
-
Step 400
400
#61A1FD
oklch(70.7% 0.151 257.6)
-
Step 500
500
#2F86FB
oklch(63.1% 0.193 257.4)
-
Step 600
600
#006DE6
oklch(55.7% 0.202 257.5)
-
Step 700
700
#005BC3
oklch(49.1% 0.179 257.6)
-
Step 800
800 (this color)
#004FAB
oklch(44.6% 0.162 257.6)
-
Step 900
900
#0A3F83
oklch(37.8% 0.126 257.5)
-
Step 950
950
#09254C
oklch(26.9% 0.08 257.7)
#004FAB 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) | #005AAE | 0.030 |
| Deuteranopia (no green cones) | #004CA9 | 0.008 |
| Tritanopia (no blue cones) | #006675 | 0.122 |
| Achromatopsia (no color) | #525252 | 0.162 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #004FAB
#004FAB
oklch(44.6% 0.162 257.6)
- #704C00
#704C00
oklch(44.5% 0.093 77.5)
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 #004FAB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.048
- Sapphire #2138AB ΔE 0.054
- Dusk Blue #26538D ΔE 0.054
- Blue Blue #2242C7 ΔE 0.055
- Light Navy #155084 ΔE 0.064
- Blueberry #464196 ΔE 0.070
- Denim Blue #3B5B92 ΔE 0.071
- Deep Sea Blue #015482 ΔE 0.071
Use #004FAB 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.