#45B9EA
Closest named color: Deep Sky Blue (#00BFFF). oklch(74.1% 0.124 230), rgb(69, 185, 234).
Aa
Black text reads best on this color (9.38:1).
About this color
#45B9EA is a medium-light, moderately saturated blue. In OKLCH its lightness is 74%, its chroma 0.124 and its hue 230°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sky Blue (#00BFFF), ΔE 0.033 away. Black text reads best on it, at 9.38:1.
| Hue family | Blues |
| Lightness | medium-light (74%) |
| Chroma | moderately saturated (0.124) |
| Temperature | cool |
| Nearest name | Deep Sky Blue (#00BFFF) |
| Black text | 9.38:1 |
| White text | 2.23:1 |
Values
| HEX | #45B9EA |
| RGB | rgb(69, 185, 234) |
| HSL | hsl(198, 80%, 59%) |
| OKLCH | oklch(74.1% 0.124 230) |
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 #45B9EA | 2.23:1 | Fails | Lc -48.6 | Large or bold text, headings |
| Black text on #45B9EA | 9.38:1 | AAA | Lc 60.2 | Content text, not long reading |
| #45B9EA text on white | 2.23:1 | Fails | Lc 43.8 | Non-text elements, placeholder text |
| #45B9EA text on black | 9.38:1 | AAA | Lc -58.4 | 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
#EFF7FB
oklch(97.1% 0.01 228.9)
-
Step 100
100
#DCEDF6
oklch(93.6% 0.022 230.5)
-
Step 200
200
#BDDFF0
oklch(88.4% 0.043 229.5)
-
Step 300
300
#8CCBE9
oklch(81% 0.077 229.3)
-
Step 400
400 (this color)
#45B9EA
oklch(74.1% 0.124 230)
-
Step 500
500
#0096C6
oklch(63% 0.126 229.9)
-
Step 600
600
#007EA7
oklch(55.5% 0.111 230)
-
Step 700
700
#006A8D
oklch(49.1% 0.098 229.8)
-
Step 800
800
#005774
oklch(42.7% 0.085 229.4)
-
Step 900
900
#004862
oklch(37.7% 0.076 230.8)
-
Step 950
950
#002B3C
oklch(27.1% 0.054 230.4)
#45B9EA 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) | #A0B6EC | 0.086 |
| Deuteranopia (no green cones) | #89A6E9 | 0.074 |
| Tritanopia (no blue cones) | #00C7C9 | 0.075 |
| Achromatopsia (no color) | #ADADAD | 0.124 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #45B9EA
#45B9EA
oklch(74.1% 0.124 230)
- #E99360
#E99360
oklch(74.1% 0.124 50.6)
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 #45B9EA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sky Blue #00BFFF ΔE 0.033
- Vivid Sky Blue #4CC9F0 ΔE 0.045
- Bright Sky Blue #02CCFE ΔE 0.052
- Turquoise Blue #06B1C4 ΔE 0.064
- Lightblue #7BC8F6 ΔE 0.065
- Carolina Blue #8AB8FE ΔE 0.069
- Sky #82CAFC ΔE 0.075
- Dark Turquoise #00CED1 ΔE 0.080
Use #45B9EA 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.