#153F98
Closest named color: Cobalt (#1E488F). oklch(39.9% 0.153 262.6), rgb(21, 63, 152).
Aa
White text reads best on this color (9.56:1).
About this color
#153F98 is a dark, vivid blue. In OKLCH its lightness is 40%, its chroma 0.153 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.031 away. White text reads best on it, at 9.56:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | vivid (0.153) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.19:1 |
| White text | 9.56:1 |
Values
| HEX | #153F98 |
| RGB | rgb(21, 63, 152) |
| HSL | hsl(221, 76%, 34%) |
| OKLCH | oklch(39.9% 0.153 262.6) |
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 #153F98 | 9.56:1 | AAA | Lc -95.8 | Preferred for body text |
| Black text on #153F98 | 2.19:1 | Fails | Lc 12.4 | Not readable |
| #153F98 text on white | 9.56:1 | AAA | Lc 91.5 | Preferred for body text |
| #153F98 text on black | 2.19:1 | Fails | Lc -10.9 | 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
#F1F6FF
oklch(97.2% 0.013 262.4)
-
Step 100
100
#DFEAFF
oklch(93.5% 0.031 263.5)
-
Step 200
200
#C6DAFF
oklch(88.5% 0.056 262.8)
-
Step 300
300
#A0C1FF
oklch(80.9% 0.095 262.7)
-
Step 400
400
#6C9EFF
oklch(70.7% 0.152 262.5)
-
Step 500
500
#4481FF
oklch(63% 0.198 262.7)
-
Step 600
600
#1661FF
oklch(55.7% 0.245 262.6)
-
Step 700
700
#014CE4
oklch(49.2% 0.237 262.6)
-
Step 800
800
#0640B8
oklch(42.8% 0.197 262.5)
-
Step 900
900 (this color)
#153F98
oklch(39.9% 0.153 262.6)
-
Step 950
950
#0A2255
oklch(27% 0.098 262.7)
#153F98 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) | #004B9B | 0.031 |
| Deuteranopia (no green cones) | #003F96 | 0.011 |
| Tritanopia (no blue cones) | #005665 | 0.119 |
| Achromatopsia (no color) | #454545 | 0.153 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #153F98
#153F98
oklch(39.9% 0.153 262.6)
- #5D4200
#5D4200
oklch(39.8% 0.082 82.1)
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 #153F98, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.031
- Sapphire #2138AB ΔE 0.036
- Twilight Blue #0A437A ΔE 0.053
- Blueberry #464196 ΔE 0.059
- Light Navy #155084 ΔE 0.061
- Dusk Blue #26538D ΔE 0.064
- Dark Slate Blue #483D8B ΔE 0.065
- Deep Sea Blue #015482 ΔE 0.073
Use #153F98 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.