#155EAD
Closest named color: Mid Blue (#276AB3). oklch(48.4% 0.143 254.6), rgb(21, 94, 173).
Aa
White text reads best on this color (6.48:1).
About this color
#155EAD is a medium-dark, vivid blue. In OKLCH its lightness is 48%, its chroma 0.143 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.038 away. White text reads best on it, at 6.48:1.
| Hue family | Blues |
| Lightness | medium-dark (48%) |
| Chroma | vivid (0.143) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 3.23:1 |
| White text | 6.48:1 |
Values
| HEX | #155EAD |
| RGB | rgb(21, 94, 173) |
| HSL | hsl(211, 78%, 38%) |
| OKLCH | oklch(48.4% 0.143 254.6) |
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 #155EAD | 6.48:1 | AA | Lc -86.8 | Fine for body text |
| Black text on #155EAD | 3.23:1 | AA large text | Lc 22.4 | Dividers and decoration only |
| #155EAD text on white | 6.48:1 | AA | Lc 81.6 | Fine for body text |
| #155EAD text on black | 3.23:1 | AA large text | Lc -20.2 | Dividers and decoration only |
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 700.
-
Step 50
50
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E1EBF7
oklch(93.6% 0.019 252.9)
-
Step 200
200
#C8DBF3
oklch(88.5% 0.039 254.3)
-
Step 300
300
#A2C3ED
oklch(80.8% 0.07 254.6)
-
Step 400
400
#6FA3E5
oklch(70.6% 0.112 254.9)
-
Step 500
500
#478BDD
oklch(63.1% 0.142 254.5)
-
Step 600
600
#2673CB
oklch(55.6% 0.155 254.7)
-
Step 700
700 (this color)
#155EAD
oklch(48.4% 0.143 254.6)
-
Step 800
800
#174F8E
oklch(42.7% 0.119 254.5)
-
Step 900
900
#1A4271
oklch(37.7% 0.092 254.4)
-
Step 950
950
#112742
oklch(27% 0.058 254.7)
#155EAD 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) | #3365B0 | 0.031 |
| Deuteranopia (no green cones) | #0C58AB | 0.018 |
| Tritanopia (no blue cones) | #00717D | 0.107 |
| Achromatopsia (no color) | #5E5E5E | 0.143 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #155EAD
#155EAD
oklch(48.4% 0.143 254.6)
- #805500
#805500
oklch(48.5% 0.102 75.1)
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 #155EAD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.038
- Denim Blue #3B5B92 ΔE 0.049
- Peacock Blue #016795 ΔE 0.051
- Dusk Blue #26538D ΔE 0.056
- French Blue #436BAD ΔE 0.056
- Dusky Blue #475F94 ΔE 0.057
- Light Navy Blue #2E5A88 ΔE 0.060
- Denim #3B638C ΔE 0.064
Use #155EAD 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.