#153D9F
Closest named color: Sapphire (#2138AB). oklch(40.1% 0.165 263.7), rgb(21, 61, 159).
Aa
White text reads best on this color (9.54:1).
About this color
#153D9F is a dark, vivid blue. In OKLCH its lightness is 40%, its chroma 0.165 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Sapphire (#2138AB), ΔE 0.024 away. White text reads best on it, at 9.54:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | vivid (0.165) |
| Temperature | cool |
| Nearest name | Sapphire (#2138AB) |
| Black text | 2.20:1 |
| White text | 9.54:1 |
Values
| HEX | #153D9F |
| RGB | rgb(21, 61, 159) |
| HSL | hsl(223, 77%, 35%) |
| OKLCH | oklch(40.1% 0.165 263.7) |
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 #153D9F | 9.54:1 | AAA | Lc -95.7 | Preferred for body text |
| Black text on #153D9F | 2.20:1 | Fails | Lc 12.6 | Not readable |
| #153D9F text on white | 9.54:1 | AAA | Lc 91.4 | Preferred for body text |
| #153D9F text on black | 2.20:1 | Fails | Lc -11.0 | 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
#A1C0FF
oklch(80.8% 0.096 264.1)
-
Step 400
400
#6E9DFF
oklch(70.6% 0.153 263.6)
-
Step 500
500
#4880FF
oklch(63% 0.198 263.8)
-
Step 600
600
#2060FF
oklch(55.7% 0.244 263.6)
-
Step 700
700
#0645EE
oklch(49.1% 0.256 263.7)
-
Step 800
800
#083BC0
oklch(42.7% 0.212 263.6)
-
Step 900
900 (this color)
#153D9F
oklch(40.1% 0.165 263.7)
-
Step 950
950
#0A2158
oklch(27% 0.104 263.7)
#153D9F 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) | #004CA2 | 0.038 |
| Deuteranopia (no green cones) | #003F9D | 0.011 |
| Tritanopia (no blue cones) | #005668 | 0.126 |
| Achromatopsia (no color) | #454545 | 0.166 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #153D9F
#153D9F
oklch(40.1% 0.165 263.7)
- #5D4300
#5D4300
oklch(40.1% 0.082 83.4)
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 #153D9F, closest first.
No curated palette has a color within ΔE 0.04 of #153D9F.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sapphire #2138AB ΔE 0.024
- Cobalt #1E488F ΔE 0.042
- Blueberry #464196 ΔE 0.062
- Twilight Blue #0A437A ΔE 0.065
- Blue Blue #2242C7 ΔE 0.068
- Dark Slate Blue #483D8B ΔE 0.070
- Light Navy #155084 ΔE 0.072
- Dusk Blue #26538D ΔE 0.073
Use #153D9F 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.