#00489F
Closest named color: Cobalt (#1E488F). oklch(42% 0.155 257.9), rgb(0, 72, 159).
Aa
White text reads best on this color (8.65:1).
About this color
#00489F is a dark, vivid blue. In OKLCH its lightness is 42%, its chroma 0.155 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.029 away. White text reads best on it, at 8.65:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | vivid (0.155) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.42:1 |
| White text | 8.65:1 |
Values
| HEX | #00489F |
| RGB | rgb(0, 72, 159) |
| HSL | hsl(213, 100%, 31%) |
| OKLCH | oklch(42% 0.155 257.9) |
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 #00489F | 8.65:1 | AAA | Lc -93.5 | Preferred for body text |
| Black text on #00489F | 2.42:1 | Fails | Lc 15.1 | Dividers and decoration only |
| #00489F text on white | 8.65:1 | AAA | Lc 88.9 | Fine for body text |
| #00489F text on black | 2.42:1 | Fails | Lc -13.3 | 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 800.
-
Step 50
50
#F0F6FE
oklch(97.1% 0.012 255.5)
-
Step 100
100
#DFEBFC
oklch(93.6% 0.026 257)
-
Step 200
200
#C5DBFB
oklch(88.5% 0.05 257.7)
-
Step 300
300
#9CC3FB
oklch(80.9% 0.09 257.4)
-
Step 400
400
#65A1F9
oklch(70.7% 0.144 257.9)
-
Step 500
500
#3786F6
oklch(63% 0.185 257.9)
-
Step 600
600
#076DE5
oklch(55.7% 0.2 257.7)
-
Step 700
700
#005AC4
oklch(49% 0.181 258)
-
Step 800
800 (this color)
#00489F
oklch(42% 0.155 257.9)
-
Step 900
900
#103F80
oklch(37.7% 0.121 258)
-
Step 950
950
#0B254B
oklch(26.9% 0.077 258.3)
#00489F 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) | #0052A2 | 0.028 |
| Deuteranopia (no green cones) | #00459D | 0.009 |
| Tritanopia (no blue cones) | #005E6C | 0.117 |
| Achromatopsia (no color) | #4C4C4C | 0.155 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #00489F
#00489F
oklch(42% 0.155 257.9)
- #674600
#674600
oklch(42% 0.088 78)
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 #00489F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.029
- Sapphire #2138AB ΔE 0.043
- Dusk Blue #26538D ΔE 0.052
- Light Navy #155084 ΔE 0.053
- Twilight Blue #0A437A ΔE 0.062
- Deep Sea Blue #015482 ΔE 0.063
- Blueberry #464196 ΔE 0.063
- Blue Blue #2242C7 ΔE 0.068
Use #00489F 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.