#153C87
Closest named color: Twilight Blue (#0A437A). oklch(37.7% 0.133 261.8), rgb(21, 60, 135).
Aa
White text reads best on this color (10.35:1).
About this color
#153C87 is a dark, moderately saturated blue. In OKLCH its lightness is 38%, its chroma 0.133 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.031 away. White text reads best on it, at 10.35:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.133) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.02:1 |
| White text | 10.35:1 |
Values
| HEX | #153C87 |
| RGB | rgb(21, 60, 135) |
| HSL | hsl(219, 73%, 31%) |
| OKLCH | oklch(37.7% 0.133 261.8) |
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 #153C87 | 10.35:1 | AAA | Lc -97.6 | Preferred for body text |
| Black text on #153C87 | 2.02:1 | Fails | Lc 10.4 | Not readable |
| #153C87 text on white | 10.35:1 | AAA | Lc 93.5 | Preferred for body text |
| #153C87 text on black | 2.02:1 | Fails | Lc -9.0 | 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
#DFEAFE
oklch(93.5% 0.03 262.5)
-
Step 200
200
#C5DAFF
oklch(88.5% 0.056 261.8)
-
Step 300
300
#9FC1FF
oklch(80.9% 0.096 262.2)
-
Step 400
400
#6A9EFF
oklch(70.6% 0.153 261.9)
-
Step 500
500
#4082FF
oklch(63.1% 0.198 261.6)
-
Step 600
600
#1C66F2
oklch(55.6% 0.222 261.7)
-
Step 700
700
#0F53D3
oklch(49% 0.207 261.8)
-
Step 800
800
#1045AA
oklch(42.6% 0.171 261.8)
-
Step 900
900 (this color)
#153C87
oklch(37.7% 0.133 261.8)
-
Step 950
950
#0D244F
oklch(27% 0.084 261.5)
#153C87 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) | #00468A | 0.027 |
| Deuteranopia (no green cones) | #003B86 | 0.012 |
| Tritanopia (no blue cones) | #004F5B | 0.104 |
| Achromatopsia (no color) | #404040 | 0.133 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #153C87
#153C87
oklch(37.7% 0.133 261.8)
- #563D00
#563D00
oklch(37.8% 0.078 82.4)
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 #153C87, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.031
- Cobalt #1E488F ΔE 0.037
- Marine Blue #01386A ΔE 0.053
- Light Navy #155084 ΔE 0.059
- Sapphire #2138AB ΔE 0.061
- Dark Slate Blue #483D8B ΔE 0.066
- Blueberry #464196 ΔE 0.069
- Dusk Blue #26538D ΔE 0.070
Use #153C87 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.