#15489B
Closest named color: Cobalt (#1E488F). oklch(42.1% 0.146 260), rgb(21, 72, 155).
Aa
White text reads best on this color (8.63:1).
About this color
#15489B is a dark, vivid blue. In OKLCH its lightness is 42%, its chroma 0.146 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.020 away. White text reads best on it, at 8.63:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | vivid (0.146) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.43:1 |
| White text | 8.63:1 |
Values
| HEX | #15489B |
| RGB | rgb(21, 72, 155) |
| HSL | hsl(217, 76%, 35%) |
| OKLCH | oklch(42.1% 0.146 260) |
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 #15489B | 8.63:1 | AAA | Lc -93.6 | Preferred for body text |
| Black text on #15489B | 2.43:1 | Fails | Lc 14.9 | Not readable |
| #15489B text on white | 8.63:1 | AAA | Lc 89.1 | Fine for body text |
| #15489B text on black | 2.43:1 | Fails | Lc -13.1 | 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
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E0EBFB
oklch(93.7% 0.025 257.6)
-
Step 200
200
#C7DAF9
oklch(88.4% 0.048 260.2)
-
Step 300
300
#A1C2F8
oklch(80.9% 0.085 260.1)
-
Step 400
400
#6DA0F5
oklch(70.7% 0.137 260.2)
-
Step 500
500
#4586F1
oklch(63.2% 0.174 259.9)
-
Step 600
600
#266CE0
oklch(55.6% 0.19 260.2)
-
Step 700
700
#185AC2
oklch(49.2% 0.176 259.8)
-
Step 800
800 (this color)
#15489B
oklch(42.1% 0.146 260)
-
Step 900
900
#193F7D
oklch(37.8% 0.114 259.8)
-
Step 950
950
#102549
oklch(26.9% 0.072 260.4)
#15489B 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) | #07529E | 0.027 |
| Deuteranopia (no green cones) | #004699 | 0.012 |
| Tritanopia (no blue cones) | #005C6A | 0.111 |
| Achromatopsia (no color) | #4C4C4C | 0.146 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #15489B
#15489B
oklch(42.1% 0.146 260)
- #664700
#664700
oklch(42.1% 0.087 80.1)
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 #15489B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.020
- Dusk Blue #26538D ΔE 0.044
- Sapphire #2138AB ΔE 0.046
- Light Navy #155084 ΔE 0.047
- Blueberry #464196 ΔE 0.054
- Twilight Blue #0A437A ΔE 0.057
- Deep Sea Blue #015482 ΔE 0.058
- Dark Slate Blue #483D8B ΔE 0.065
Use #15489B 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.