#153D88
Closest named color: Twilight Blue (#0A437A). oklch(38.1% 0.133 261.5), rgb(21, 61, 136).
Aa
White text reads best on this color (10.21:1).
About this color
#153D88 is a dark, moderately saturated blue. In OKLCH its lightness is 38%, its chroma 0.133 and its hue 261°. 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 10.21:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.133) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.05:1 |
| White text | 10.21:1 |
Values
| HEX | #153D88 |
| RGB | rgb(21, 61, 136) |
| HSL | hsl(219, 73%, 31%) |
| OKLCH | oklch(38.1% 0.133 261.5) |
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 #153D88 | 10.21:1 | AAA | Lc -97.3 | Preferred for body text |
| Black text on #153D88 | 2.05:1 | Fails | Lc 10.7 | Not readable |
| #153D88 text on white | 10.21:1 | AAA | Lc 93.2 | Preferred for body text |
| #153D88 text on black | 2.05:1 | Fails | Lc -9.3 | 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 900.
-
Step 50
50
#F0F6FF
oklch(97.1% 0.014 258.3)
-
Step 100
100
#DFEBFE
oklch(93.7% 0.029 259.6)
-
Step 200
200
#C5DAFF
oklch(88.5% 0.056 261.8)
-
Step 300
300
#9EC1FF
oklch(80.8% 0.096 261.6)
-
Step 400
400
#699EFF
oklch(70.6% 0.153 261.6)
-
Step 500
500
#3F82FF
oklch(63.1% 0.198 261.5)
-
Step 600
600
#1A66F2
oklch(55.5% 0.222 261.5)
-
Step 700
700
#0C54D3
oklch(49.2% 0.206 261.4)
-
Step 800
800
#0E45AA
oklch(42.6% 0.171 261.5)
-
Step 900
900 (this color)
#153D88
oklch(38.1% 0.133 261.5)
-
Step 950
950
#0D244F
oklch(27% 0.084 261.5)
#153D88 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) | #00468B | 0.025 |
| Deuteranopia (no green cones) | #003C87 | 0.012 |
| Tritanopia (no blue cones) | #004F5C | 0.102 |
| Achromatopsia (no color) | #414141 | 0.134 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #153D88
#153D88
oklch(38.1% 0.133 261.5)
- #573D00
#573D00
oklch(37.9% 0.078 81.4)
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 #153D88, 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 0.034
- Marine Blue #01386A ΔE 0.055
- Light Navy #155084 ΔE 0.056
- Sapphire #2138AB ΔE 0.060
- Dark Slate Blue #483D8B ΔE 0.065
- Dusk Blue #26538D ΔE 0.067
- Blueberry #464196 ΔE 0.067
Use #153D88 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.