#154BA3
Closest named color: Cobalt (#1E488F). oklch(43.4% 0.153 260.1), rgb(21, 75, 163).
Aa
White text reads best on this color (8.18:1).
About this color
#154BA3 is a dark, vivid blue. In OKLCH its lightness is 43%, its chroma 0.153 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.033 away. White text reads best on it, at 8.18:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | vivid (0.153) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.56:1 |
| White text | 8.18:1 |
Values
| HEX | #154BA3 |
| RGB | rgb(21, 75, 163) |
| HSL | hsl(217, 77%, 36%) |
| OKLCH | oklch(43.4% 0.153 260.1) |
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 #154BA3 | 8.18:1 | AAA | Lc -92.4 | Preferred for body text |
| Black text on #154BA3 | 2.56:1 | Fails | Lc 16.3 | Dividers and decoration only |
| #154BA3 text on white | 8.18:1 | AAA | Lc 87.7 | Fine for body text |
| #154BA3 text on black | 2.56:1 | Fails | Lc -14.4 | 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
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#E0EBFC
oklch(93.7% 0.026 259)
-
Step 200
200
#C6DAFB
oklch(88.4% 0.051 260.4)
-
Step 300
300
#9FC2FB
oklch(80.9% 0.09 260)
-
Step 400
400
#6AA0F9
oklch(70.7% 0.143 259.9)
-
Step 500
500
#4185F6
oklch(63.1% 0.183 260)
-
Step 600
600
#206BE5
oklch(55.6% 0.199 260.1)
-
Step 700
700
#1258C7
oklch(49% 0.186 260.2)
-
Step 800
800 (this color)
#154BA3
oklch(43.4% 0.153 260.1)
-
Step 900
900
#173E80
oklch(37.7% 0.12 260.3)
-
Step 950
950
#0F254B
oklch(27% 0.076 260.5)
#154BA3 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) | #0156A6 | 0.029 |
| Deuteranopia (no green cones) | #0049A1 | 0.012 |
| Tritanopia (no blue cones) | #00616F | 0.118 |
| Achromatopsia (no color) | #4F4F4F | 0.153 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #154BA3
#154BA3
oklch(43.4% 0.153 260.1)
- #6A4A00
#6A4A00
oklch(43.3% 0.09 80.2)
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 #154BA3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.033
- Sapphire #2138AB ΔE 0.047
- Dusk Blue #26538D ΔE 0.047
- Light Navy #155084 ΔE 0.055
- Blueberry #464196 ΔE 0.057
- Blue Blue #2242C7 ΔE 0.062
- Deep Sea Blue #015482 ΔE 0.064
- Denim Blue #3B5B92 ΔE 0.069
Use #154BA3 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.