#015B91
Closest named color: Dusk Blue (#26538D). oklch(45.5% 0.114 244.9), rgb(1, 91, 145).
Aa
White text reads best on this color (7.22:1).
About this color
#015B91 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 46%, its chroma 0.114 and its hue 245°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.026 away. White text reads best on it, at 7.22:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | moderately saturated (0.114) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.90:1 |
| White text | 7.22:1 |
Values
| HEX | #015B91 |
| RGB | rgb(1, 91, 145) |
| HSL | hsl(203, 99%, 29%) |
| OKLCH | oklch(45.5% 0.114 244.9) |
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 #015B91 | 7.22:1 | AAA | Lc -89.4 | Fine for body text |
| Black text on #015B91 | 2.90:1 | Fails | Lc 19.5 | Dividers and decoration only |
| #015B91 text on white | 7.22:1 | AAA | Lc 84.5 | Fine for body text |
| #015B91 text on black | 2.90:1 | Fails | Lc -17.5 | 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 800.
-
Step 50
50
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E0ECF6
oklch(93.7% 0.019 243)
-
Step 200
200
#C6DCF0
oklch(88.4% 0.036 245.7)
-
Step 300
300
#9DC6E9
oklch(80.9% 0.066 244.5)
-
Step 400
400
#64A7DE
oklch(70.6% 0.106 244.9)
-
Step 500
500
#3190D5
oklch(63.1% 0.135 244.7)
-
Step 600
600
#0079BF
oklch(55.7% 0.14 245)
-
Step 700
700
#0065A1
oklch(49% 0.124 245.1)
-
Step 800
800 (this color)
#015B91
oklch(45.5% 0.114 244.9)
-
Step 900
900
#09456D
oklch(37.7% 0.089 244.8)
-
Step 950
950
#0A2940
oklch(27.1% 0.056 244.7)
#015B91 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) | #415D93 | 0.046 |
| Deuteranopia (no green cones) | #2C5290 | 0.031 |
| Tritanopia (no blue cones) | #00686F | 0.078 |
| Achromatopsia (no color) | #575757 | 0.114 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #015B91
#015B91
oklch(45.5% 0.114 244.9)
- #7D4800
#7D4800
oklch(45.5% 0.103 64.3)
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 #015B91, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.026
- Light Navy Blue #2E5A88 ΔE 0.027
- Deep Sea Blue #015482 ΔE 0.030
- Light Navy #155084 ΔE 0.035
- Peacock Blue #016795 ΔE 0.036
- Denim Blue #3B5B92 ΔE 0.038
- Denim #3B638C ΔE 0.048
- Cobalt #1E488F ΔE 0.054
Use #015B91 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.