#307C88
Closest named color: Ocean (#017B92). oklch(54.5% 0.076 209.5), rgb(48, 124, 136).
Aa
White text reads best on this color (4.81:1).
About this color
#307C88 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 54%, its chroma 0.076 and its hue 210°. Its hue sits on the cool side of the wheel. The nearest named color is Ocean (#017B92), ΔE 0.024 away. White text reads best on it, at 4.81:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (54%) |
| Chroma | moderately saturated (0.076) |
| Temperature | cool |
| Nearest name | Ocean (#017B92) |
| Black text | 4.36:1 |
| White text | 4.81:1 |
Values
| HEX | #307C88 |
| RGB | rgb(48, 124, 136) |
| HSL | hsl(188, 48%, 36%) |
| OKLCH | oklch(54.5% 0.076 209.5) |
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 #307C88 | 4.81:1 | AA | Lc -78.6 | Fine for body text |
| Black text on #307C88 | 4.36:1 | AA large text | Lc 30.9 | Non-text elements, placeholder text |
| #307C88 text on white | 4.81:1 | AA | Lc 73.1 | Content text, not long reading |
| #307C88 text on black | 4.36:1 | AA large text | Lc -28.5 | 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 600.
-
Step 50
50
#F2F6F7
oklch(97% 0.004 214.3)
-
Step 100
100
#E3ECED
oklch(93.7% 0.01 204.9)
-
Step 200
200
#CCDDE0
oklch(88.6% 0.019 209.4)
-
Step 300
300
#A8C7CD
oklch(80.9% 0.034 210.7)
-
Step 400
400
#78AAB3
oklch(70.6% 0.054 209.9)
-
Step 500
500
#5395A0
oklch(63% 0.069 209.4)
-
Step 600
600 (this color)
#307C88
oklch(54.5% 0.076 209.5)
-
Step 700
700
#256C76
oklch(49.2% 0.071 208.3)
-
Step 800
800
#215860
oklch(42.8% 0.058 208.4)
-
Step 900
900
#21484F
oklch(37.6% 0.046 210.7)
-
Step 950
950
#142A2E
oklch(26.9% 0.029 210.5)
#307C88 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) | #717889 | 0.071 |
| Deuteranopia (no green cones) | #646E88 | 0.065 |
| Tritanopia (no blue cones) | #008280 | 0.031 |
| Achromatopsia (no color) | #727272 | 0.076 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #307C88
#307C88
oklch(54.5% 0.076 209.5)
- #975F56
#975F56
oklch(54.5% 0.075 29.6)
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 #307C88, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Ocean #017B92 ΔE 0.024
- Deep Aqua #08787F ΔE 0.027
- Teal #008080 ΔE 0.027
- Bluegreen #017A79 ΔE 0.033
- Cerulean #457B9D ΔE 0.041
- Metallic Blue #4F738E ΔE 0.041
- Sea Blue #047495 ΔE 0.042
- Teal Blue #01889F ΔE 0.043
Use #307C88 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.