#127DD2
Closest named color: Water Blue (#0E87CC). oklch(57.9% 0.157 249.8), rgb(18, 125, 210).
Aa
Black text reads best on this color (4.88:1).
About this color
#127DD2 is a medium-dark, vivid blue. In OKLCH its lightness is 58%, its chroma 0.157 and its hue 250°. Its hue sits on the cool side of the wheel. The nearest named color is Water Blue (#0E87CC), ΔE 0.031 away. Black text reads best on it, at 4.88:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | vivid (0.157) |
| Temperature | cool |
| Nearest name | Water Blue (#0E87CC) |
| Black text | 4.88:1 |
| White text | 4.29:1 |
Values
| HEX | #127DD2 |
| RGB | rgb(18, 125, 210) |
| HSL | hsl(207, 84%, 45%) |
| OKLCH | oklch(57.9% 0.157 249.8) |
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 #127DD2 | 4.29:1 | AA large text | Lc -74.6 | Content text, not long reading |
| Black text on #127DD2 | 4.88:1 | AA | Lc 35.0 | Non-text elements, placeholder text |
| #127DD2 text on white | 4.29:1 | AA large text | Lc 69.1 | Content text, not long reading |
| #127DD2 text on black | 4.88:1 | AA | Lc -32.6 | Non-text elements, placeholder text |
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 600.
-
Step 50
50
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E0EBF7
oklch(93.5% 0.02 250.4)
-
Step 200
200
#C6DCF3
oklch(88.5% 0.04 249.5)
-
Step 300
300
#9EC5ED
oklch(80.9% 0.071 249.4)
-
Step 400
400
#67A5E4
oklch(70.6% 0.113 250.1)
-
Step 500
500
#388DDC
oklch(63% 0.144 249.9)
-
Step 600
600 (this color)
#127DD2
oklch(57.9% 0.157 249.8)
-
Step 700
700
#0063AB
oklch(49.2% 0.138 249.7)
-
Step 800
800
#00518D
oklch(42.7% 0.12 249.5)
-
Step 900
900
#104371
oklch(37.6% 0.094 250.3)
-
Step 950
950
#0C2842
oklch(27.1% 0.059 249.5)
#127DD2 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) | #5283D5 | 0.048 |
| Deuteranopia (no green cones) | #3273D0 | 0.028 |
| Tritanopia (no blue cones) | #00929D | 0.115 |
| Achromatopsia (no color) | #7A7A7A | 0.157 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #127DD2
#127DD2
oklch(57.9% 0.157 249.8)
- #A96A00
#A96A00
oklch(57.9% 0.126 69.3)
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 #127DD2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Water Blue #0E87CC ΔE 0.031
- Windows Blue #3778BF ΔE 0.032
- Nice Blue #107AB0 ΔE 0.053
- Cool Blue #4984B8 ΔE 0.059
- Steel Blue #4682B4 ΔE 0.059
- Cerulean Blue #056EEE ΔE 0.061
- Royal Blue #4169E1 ΔE 0.062
- Dark Sky Blue #448EE4 ΔE 0.063
Use #127DD2 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.