#45B9EF
Closest named color: Deep Sky Blue (#00BFFF). oklch(74.3% 0.128 232.6), rgb(69, 185, 239).
Aa
Black text reads best on this color (9.43:1).
About this color
#45B9EF is a medium-light, moderately saturated blue. In OKLCH its lightness is 74%, its chroma 0.128 and its hue 233°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sky Blue (#00BFFF), ΔE 0.028 away. Black text reads best on it, at 9.43:1.
| Hue family | Blues |
| Lightness | medium-light (74%) |
| Chroma | moderately saturated (0.128) |
| Temperature | cool |
| Nearest name | Deep Sky Blue (#00BFFF) |
| Black text | 9.43:1 |
| White text | 2.22:1 |
Values
| HEX | #45B9EF |
| RGB | rgb(69, 185, 239) |
| HSL | hsl(199, 84%, 60%) |
| OKLCH | oklch(74.3% 0.128 232.6) |
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 #45B9EF | 2.22:1 | Fails | Lc -48.2 | Large or bold text, headings |
| Black text on #45B9EF | 9.43:1 | AAA | Lc 60.5 | Content text, not long reading |
| #45B9EF text on white | 2.22:1 | Fails | Lc 43.5 | Non-text elements, placeholder text |
| #45B9EF text on black | 9.43:1 | AAA | Lc -58.7 | Large or bold text, headings |
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 400.
-
Step 50
50
#EFF7FC
oklch(97.2% 0.011 234.8)
-
Step 100
100
#DBEDF7
oklch(93.6% 0.023 231.8)
-
Step 200
200
#BDDFF2
oklch(88.5% 0.044 232.4)
-
Step 300
300
#8BCAEC
oklch(80.9% 0.08 232.7)
-
Step 400
400 (this color)
#45B9EF
oklch(74.3% 0.128 232.6)
-
Step 500
500
#0095CA
oklch(63% 0.13 232.7)
-
Step 600
600
#007DAB
oklch(55.5% 0.115 233.2)
-
Step 700
700
#006990
oklch(49% 0.101 232.9)
-
Step 800
800
#005677
oklch(42.6% 0.088 233.1)
-
Step 900
900
#004864
oklch(37.8% 0.078 232.8)
-
Step 950
950
#002B3D
oklch(27.1% 0.055 231.9)
#45B9EF 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) | #9EB7F2 | 0.083 |
| Deuteranopia (no green cones) | #87A6EE | 0.072 |
| Tritanopia (no blue cones) | #00C7CB | 0.078 |
| Achromatopsia (no color) | #AEAEAE | 0.128 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #45B9EF
#45B9EF
oklch(74.3% 0.128 232.6)
- #EB935B
#EB935B
oklch(74.3% 0.128 52)
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 #45B9EF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sky Blue #00BFFF ΔE 0.028
- Vivid Sky Blue #4CC9F0 ΔE 0.045
- Bright Sky Blue #02CCFE ΔE 0.051
- Lightblue #7BC8F6 ΔE 0.064
- Carolina Blue #8AB8FE ΔE 0.066
- Turquoise Blue #06B1C4 ΔE 0.071
- Sky #82CAFC ΔE 0.074
- Light Sky Blue #87CEFA ΔE 0.085
Use #45B9EF 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.